What does a digital marketing agency do and do you need one?

A digital marketing agency helps businesses drive measurable revenue through online channels like organic search, social media, email, and paid advertising. In other words, a digital marketing agency can assist with driving revenue and saving time when marketing a business online.

In this guide, WebFX covers these topics to address your questions surrounding digital marketing agencies:

What is a digital marketing agency?

A digital marketing agency is a team that helps businesses grow online by improving visibility, generating leads, and driving revenue.

Partnering with an agency provides strategies and results as an alternative to an in-house team.

Types of digital marketing agencies

So, now you know the answer to the question "what does a digital marketing agency do?", let's look into different types of agencies.

Not all digital marketing agencies are the same. You need to find the agency that fits your business's needs and projects.

Here are a few different digital marketing agencies you'll run into:

• Full-service agencies: Full-service digital marketing agencies offer nearly any service you need, from SEO to influencer marketing to web design. These agencies are an option if you think you'll need help with multiple marketing strategies.
• Niche marketing agencies: Niche marketing agencies typically only work with a certain set of clients. For example, an agency may specialize in home services marketing and only work with clients in that industry.
• Strategy-specialized agencies: If an agency isn't full-service, they likely only specialize in one or two strategies that they offer to clients. SEO agencies, which only offer SEO services, are the most common. These agencies are an option if you're only looking to invest in a certain strategy, like SEO or web design.

What does a digital marketing agency do?

A digital marketing agency helps businesses increase their online visibility, build brand awareness, and reach more potential customers online with established strategies like search engine optimization (SEO), paid advertising, social media marketing, and much more.

Digital marketing agencies are essentially experts and specialists you can hire and partner with to create and manage tailored strategies to help your business grow online and earn more revenue.

1. SEO

SEO is the process of optimizing your ranking in search results to drive more qualified traffic to your business's website.

When done right, SEO helps your business appear when potential customers search for products or services you offer. This means reaching buyers who are actively looking online for what you sell.

SEO's business impact:

SEO results also compound over time as your website builds authority and pages rank higher.

What digital marketing agencies do:

After analyzing your site's overall SEO health, the agency will typically prioritize quick wins first by:

• Fixing technical issues
• Claiming and optimizing your Google Business Profile, if you're a local business
• Optimizing the pages with the highest potential to show results

Then, they'll focus on building longer-term success by:

• Building your site's technical SEO foundations
• Creating helpful content for your customers
• Fostering trust through partnerships, digital PR, and reputation management

Throughout this process, agencies monitor performance and adjust tactics as search algorithms evolve. That way, they ensure your rankings don't just grow, but stay consistent over time.

2. AI search optimization

As search behavior evolves, digital marketing agencies are now helping businesses maintain visibility in AI-generated answers from ChatGPT, Perplexity, and Google AI Overviews.

If you've noticed your organic traffic declining recently, you're not alone. Generate AI search is growing 165 times faster than organic search. Your customers are already using AI search to research solutions and evaluate businesses like yours.

For example, when someone looks for "best project management software for construction," Google's AI Overview synthesizes information from multiple sources into one answer. That being said, this doesn't mean your business becomes invisible - it means visibility strategies must evolve.

AI search optimization's business impact:

Businesses that optimize for AI search maintain their visibility and authority as search behavior shifts. Research shows that traffic from generative AI delivers a 23% higher conversion rate than organic search, meaning these visitors are highly qualified and likely shopping around.

While traditional clicks may decrease, appearing in AI-generated answers keeps your brand top-of-mind and positions you as a trusted source when prospects are ready to buy.

What digital marketing agencies do:

Agencies that are quick to adapt can improve your business's visibility in AI searches through a structured approach:

• Foundation: Focusing on traditional SEO foundations and ensuring site crawlability
• Relevance: Aligning content with customer search intent and the query patterns AI platforms recognize
• Trust: Building real-world credibility and industry authority (via E-E-A-T signals, backlinks, and reviews) that AI systems recognize and trust
• Influence: Creating an external footprint across reviews, directories, forums, and media that LLMs recognize and cite when generating answers

These agencies also track where and how often your brand appears in AI-generated responses, so they can adjust strategies to improve your brand's citation frequency and visibility.

3. PPC advertising

PPC advertising puts your business in front of your prospects on different channels:

• Search engines (through Google Ads and Microsoft Ads)
• Social media platforms (like Facebook, LinkedIn, and Instagram)
• Display networks

Unlike organic strategies that build momentum over time, PPC delivers immediate visibility by targeting users based on demographics, interests, online behavior, and buying intent.

When someone searches for exactly what you offer, PPC ensures your business appears at the top of search results-precisely when prospects are ready to take action. You only pay when someone clicks your ad, making every dollar directly tied to engagement.

For example, if you offer HVAC services, PPC can place your business at the top of search results when someone searches for "HVAC services near me." You only pay when someone clicks your ad, so your budget goes toward people genuinely interested in your services.

PPC's business impact:

PPC is effective for capturing high-intent buyers actively searching for solutions. In fact, paid ad visitors are 50% more likely to buy than organic visitors, meaning prospects who are ready to buy are clicking ads, not just browsing.

If you need immediate leads or sales, PPC can deliver results within days, not months. You're also in control - you can increase spend on campaigns that perform, adjust ones that don't, or immediately pause what's not working and reallocate your budget.

What digital marketing agencies do:

After analyzing your market and current performance, agencies typically structure PPC campaigns around:

• Audience targeting: Identifying high-value customer segments based on search behavior, demographics, and buying signals
• Campaign architecture: Building ad groups and keyword strategies that match customer intent at different stages of the buying journey
• Creative testing: Developing and testing ad copy, visuals, and landing page combinations to maximize conversion rates
• Budget optimization: Allocating spend strategically across platforms and campaigns to maximize ROI
• Campaign monitoring and reporting: Tracking performance metrics (cost per click, conversion rates, customer acquisition cost) and adjusting bidding, ad creative, and targeting to improve results and lower costs over time

4. Content marketing

Content marketing is the strategic creation and distribution of valuable content that educates your audience, answers their questions, and builds trust in your business. Content types include the following:

• Blog posts
• Videos
• Guides
• Case studies
• Original research or survey
• Infographics

When prospects are researching solutions, your content guides them through their decision-making process, helping them understand their options and recognize your business as a partner. Over time, your published content will establish your business as an authority in your field, support your SEO efforts, and nurture your prospects throughout their customer journey.

Content marketing's business impact:

Content marketing delivers compounding returns over time. The key advantage is longevity - evergreen content continues attracting organic traffic, generating leads, and building authority long after it's published.

For example, a single comprehensive guide can drive qualified traffic for years, generating leads month after month without additional investment. This long-term asset approach directly impacts your bottom line by reducing customer acquisition costs and building sustainable revenue streams.

What digital marketing agencies do:

Based on your customers' pain points and information needs, agencies typically build content strategies around:

• Content planning: Identifying topics that address customer pain points at each stage of the buyer journey (awareness, consideration, and decision)
• SEO integration: Creating content optimized for search engines to drive organic traffic while naturally incorporating target keywords
• Content creation: Producing blog posts, guides, videos, case studies, and resources that establish your expertise
• Distribution strategy: Promoting content through email, social media, and other channels to maximize reach and engagement
• Performance tracking: Monitoring organic traffic, lead generation, and conversion metrics to understand what content drives business results and refine the strategy accordingly

5. Social media marketing

Social media marketing is the strategic use of social platforms like LinkedIn, Facebook, Instagram, and TikTok to build brand awareness, engage with your audience, and drive business growth.

Social media gives you direct access to where your customers spend their time. You can build community, share your expertise, and stay top-of-mind through consistent engagement.

The platforms depend on your audience. B2B businesses often prioritize LinkedIn to reach decision-makers, while consumer brands typically focus on Instagram and Facebook for visual storytelling and community building.

Social media marketing's business impact:

Social media creates multiple touchpoints throughout the customer journey - from initial brand discovery to ongoing relationship building. Social media strategies focus on both community engagement and business outcomes.

For example, a professional services firm might use social platforms to answer common client questions publicly, demonstrating expertise that engages both their existing clients and prospects. This engagement directly impacts your bottom line by attracting and possibly acquiring new customers while nurturing relationships with current customers, increasing their lifetime value.

What digital marketing agencies do:

Agencies typically help you build social media strategies around:

• Platform selection: Choosing the right channels based on where your audience is active
• Content strategy: Creating educational, promotional, and engaging content aligned with your brand
• Community management: Developing brand voice playbooks and managing ongoing engagement with prospects and customers on social media
• Paid social advertising: Running targeted campaigns to reach new audiences
• Performance tracking and reporting: Monitoring metrics, reporting results, and refining what works

6. Email marketing

Email marketing is the strategic use of email to nurture leads, engage customers, and drive conversions through targeted messaging.

This digital marketing strategy goes beyond newsletters, with different email types serving specific purposes in the customer journey:

• Automated welcome and thank-you sequences
• Promotional campaigns
• Abandoned cart emails
• Informational newsletters

Email marketing's business impact:

Email marketing delivers ROI. For every dollar spent, businesses see an average return of $36 to $40.

For example, an e-commerce business might use automated emails to recover abandoned shopping carts. A B2B company might send educational emails over several months to stay in touch with prospects until they're ready to buy.

Email drives revenue by bringing customers back for repeat purchases, recovering lost sales, and keeping your business top-of-mind with prospects throughout their decision-making process.

What digital marketing agencies do:

Agencies typically help with the following:

• List building and segmentation: Growing your subscriber base and organizing contacts by behavior, interests, and buying stage
• Automation and drip campaigns: Creating automated email sequences that nurture leads based on triggers and actions
• Personalization: Tailoring content, subject lines, and offers to individual subscriber preferences and behaviors
• Campaign creation: Designing and writing emails that drive opens, clicks, and conversions
• Performance tracking and reporting: Monitoring open rates, click-through rates, and revenue attribution to optimize campaigns

For example, agencies work with you to understand your customer behavior, segment your customer list, and set up automated emails for different scenarios

• Welcome emails for new customers
• Cart abandonment sequences
• Re-engagement campaigns

Agencies also track and measure your email marketing campaigns' performance, so they can refine your strategy to maximize revenue.

7. Conversion rate optimization (CRO)

CRO is the process of improving your website and landing pages to turn more visitors into leads, subscribers, or customers.

CRO focuses on getting better results from your site traffic. Instead of spending more to drive more additional visitors, you're optimizing your existing website to work harder for you by making it easy for site visitors to convert.

CRO's business impact:

CRO maximizes the value of every visitor. For example, even small improvements in conversion rates can increase revenue without spending more on advertising.

These improvements compound over time across all channels. Traffic coming from organic search converts better and your paid ad campaigns deliver improved returns.

What digital marketing agencies do:

A good agency will work with you on a comprehensive CRO approach, which includes the following:

• Conversion analysis: To identify where visitors drop off and what prevents them from taking your desired action
• A/B testing: To test different copies, layouts, calls-to-action, and page elements to check what drives better results
• User experience improvements: To simplify navigation and forms, and remove friction from the conversion process
• Landing page optimization: To create and refine dedicated campaign pages that focus on a conversion goal
• Performance tracking and reporting: To measure CRO results and its impact on your revenue, so it can prioritize high-value improvements

8. Website design and development

Web design and development is the process of creating and updating your website so it looks professional, works smoothly, and attracts visitors to become customers.

Your website is often the first impression potential customers have of your business. In fact, half of consumers say their impression of a business depends on its website design, making your site a critical avenue to improve your company's credibility.

Website design and development's impact:

An effective website directly influences whether visitors become customers. With a professional-looking website, you build trust among your audience.

Pair it with clear navigation and fast load times, and you have a website that entices visitors to engage with your business.

What web design and development agencies do:

Good agencies providing website design and development services will ensure that your site is intuitive for your users. Their approach will likely include:

• User experience (UX) design: To make your website easy to navigate, use, and interact with
• Responsive design: To make your website work properly on desktops, tablets, and mobile devices
• Performance optimization: To improve site speed and technical performance to improve rankings and reduce bounce rates

9. Marketing analytics and reporting

Good digital marketing agencies don't just run campaigns and call it a day. They monitor results, identify what's working and what's not, and continuously optimize your campaigns.

With marketing analytics and reporting, agencies can better understand which efforts are driving results and where to invest their budget.

Business impact of marketing analytics and reporting:

Clear reporting turns marketing into a measurable investment. When you see which channels drive revenue and qualified leads, you make smarter budget decisions.

For example, analytics might show that visitors who read case studies before requesting a demo are three times more likely to become customers. The agency would use that insight to make case studies more prominent and include them in nurture sequences.

What digital marketing agencies do:

• Goal and KPI setup: Defining success metrics aligned with your revenue goals
• Performance dashboards: Creating visual reports using tools like Google Analytics, or building custom dashboards for your needs
• Revenue attribution: Understanding which marketing efforts contribute to sales
• Regular reporting: Providing consistent performance updates and recommendations
• Data-driven optimization: Using insights to adjust strategy and budget allocation

Why do businesses hire a digital marketing agency?

Businesses turn to digital marketing agencies at different stages of growth and for various reasons. Here are the most common scenarios:

When internal resources are stretched thin

Your team is juggling too many responsibilities, and marketing tasks are falling through the cracks. An agency fills this gap by handling campaigns, content, and analytics so your team can focus on core business operations.

When you're not seeing results from current efforts

You've been running marketing campaigns, but you don't see results:

• Site visitors aren't converting
• Ad spend isn't delivering ROI
• Organic visibility has plateaued

Agencies bring specialized expertise to diagnose issues and implement strategies that drive measurable results.

When you're ready to scale

Your business is growing, and you need marketing that can keep pace. Hiring a digital marketing agency as a partner makes sense when you're:

• Entering new markets
• Launching new products
• Expanding your customer base

When you lack specific expertise

Digital marketing is always evolving - from SEO algorithm updates and AI search optimization to new advertising platforms. Instead of trying to become an expert in everything, businesses hire agencies to get access to specialists who know the latest industry changes and best practices.

When you need faster execution

While you can DIY SEO and create a website with AI-powered site builders, there will be times when businesses need to run time-sensitive campaigns or respond to market opportunities. Agencies have established processes and dedicated teams to immediately execute campaigns without sacrificing quality.

This story was produced by WebFX and reviewed and distributed by Stacker.

Copyright 2026 Stacker Media, LLC

This story was originally published May 4, 2026 at 9:00 AM.