What Does a Digital Marketing Agency Do — And Do You Need One?

Half of marketers say that SEO provides a better return on investment (ROI) than any other marketing strategy. SEO results also compound over time as your website builds authority and pages rank higher.

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.

Businesses that optimize for AI search maintain their visibility and authority as search behavior shifts. Our study 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.

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.

PPC is best for capturing high-intent buyers actively searching for solutions. In fact, 65% of all high-intent searches result in an ad click, 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.

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

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.

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 high-quality 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 real business results and refine the strategy accordingly

Social media creates multiple touchpoints throughout the customer journey — from initial brand discovery to ongoing relationship building. Successful 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 because you’re attracting and possibly acquiring new customers while nurturing your relationships with current customers, increasing their lifetime value.

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

Email marketing delivers strong 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.

A good agency will help you 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 compelling 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.

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.

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

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.

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

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.

• 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

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.

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.

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

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.

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.

Yes small businesses can benefit from a hiring a digital marketing agency! An agency can help a small business establish an online presence and stand out from competitors, enabling them to drive revenue and business growth.

Not every business will need a digital marketing agency. If you have an in-house marketing team that can handle managing, trackling, and optimizing multiple digital marketing strategies and are able to drive results and accomplish business goals, then you likely don’t need to outsource. But if your business lacks the expertise and resources to manage your strategies in-house, a digital marketing agency will be a good fit.

A digital marketing agency will track multiple KPIs for your company, including:

• Return on investment (ROI)
• Revenue
• Leads
• Organic traffic
• Impressions
• Conversion rate
• Click-through Rate (CTR)
• Customer Acquisition Cost (CAC)
• And much more

Yes, working with digital marketing agencies is standard practice for businesses of all sizes. Many successful companies use agencies to supplement in-house teams or handle their entire marketing operation.

Agencies allow businesses to access expertise without the overhead of full-time employees. Even large companies with internal marketing teams often hire agencies for specific capabilities, like an SEO agency for technical optimization or a paid media agency for campaign management.

For SMBs, agencies are often the most practical way to compete online without building an entire marketing department and purchasing marketing tools.

Great digital marketing agencies offer a variety of services to help their clients achieve their marketing goals. This includes digital marketing services like: 

• SEO
• PPC
• Content marketing
• Web design
• Email marketing
• Social media management and marketing
• And more

Digital marketing uses online platforms and technology to effectively market your products and services on the Internet, so you can better reach and convert qualified leads. With digital marketing, you can also easily monitor customer behavior and engagement, so you can track the success of your campaigns and easily identify which strategies are driving results. 

If you want access to several marketing strategies and campaigns, a full-service digital marketing agency, like WebFX, is the way to go.

Most businesses hire digital marketing agencies when they recognize gaps their internal teams can’t fill. Common triggers include:

• Marketing tasks consistently fall through the cracks due to limited bandwidth
• You need specialized skills that don’t justify full-time hires
• Results from your in-house efforts have plateaued or are declining
• You’re launching a new product, entering a new market, or scaling quickly
• Current marketing efforts aren’t generating measurable results

Essentially, if marketing is critical to growth but your team lacks the time, expertise, or tools to do it effectively, that’s when an agency makes sense.

This is the question that marketers and business owners face: Do I outsource or do I handle marketing internally?

If you’re still debating, watch the video below to see the pros and cons of each:

🎥Video: In-House Marketing vs. Agency Marketing: Which is Best?

Look for agencies with relevant experience in your industry, clear communication, and a strategic approach to your goals.

During consultations, ask about:

• Their process
• Past results with similar businesses
• Reporting cadence
• Contract terms

Pay attention to whether they invest time understanding your business before proposing solutions — template pitches are a red flag. Read our guide on how to choose a digital marketing agency.

If you’re hiring a digital marketing agency as an extension of your current marketing team, you might feel a little nervous about making the partnership work. Here are a few tips to help you make your collaboration a breeze:

• Setting a communication frequency: Setting expectations about communication frequency will help reduce a lot of friction and set expectations. For example, you could agree to monthly reporting, taking place at the beginning of the month, through a video chat. Setting this guideline holds your agency accountable while keeping your team in the loop.
• Use project management tools: It’s always a great idea to go with an agency that has project management software. It makes it easy for you to keep tabs on your campaigns and stay in the loop on what your agency works on.
• Create an approval process: If your agency needs your approval for certain campaigns or marketing copy, make sure you have a process in place to give approval in a timely manner. It will ensure that everyone works harmoniously between the teams.