Competitor SEO Analysis: How to Find and Exploit Content Gaps

Competitor SEO analysis compares your keyword profile, content, and backlinks against competing websites to find gaps and opportunities you are missing. It typically reveals 50-200+ untapped keyword opportunities.

Why Competitor Analysis Is the Smartest Starting Point

Your competitors have already invested time and money figuring out which keywords drive traffic in your industry. They have tested content formats, built backlinks, and optimized their pages through trial and error. By analyzing their strategies, you can skip much of the guesswork and focus on proven opportunities.

Every competitor analysis I perform for clients follows a structured methodology using SEMrush data, Google Search Console insights, and manual review. The process typically reveals 50-200+ keyword opportunities that the client is not currently targeting — many of which are achievable with focused effort.

Step 1: Identify Your Real SEO Competitors

Your SEO competitors are not always your business competitors. A local plumber's business competitors might be the two other plumbers down the road. But their SEO competitors — the websites ranking for the same keywords — might include national directories, home improvement blogs, and franchise operations.

I identify SEO competitors through two methods:

• SEMrush competitor discovery: Running a domain overview reveals which domains share the most organic keywords with the client's site. This often surfaces competitors the client was not aware of.
• Manual keyword search: Searching the client's top 10-15 target keywords and noting which domains appear repeatedly across multiple results pages. The domains that consistently show up are the real SEO competitors.

I typically analyze 3-5 competitors for a thorough analysis. More than five creates information overload without proportional insight.

Step 2: Keyword Gap Analysis

This is where the highest-value opportunities hide. Keyword gap analysis compares the client's keyword profile against each competitor to find three types of opportunities:

Missing Keywords (Highest Priority)

Keywords that competitors rank for but the client does not rank for at all. These represent entirely untapped opportunities. I filter these by:

• Search volume: Minimum 50 monthly searches (lower threshold for niche B2B keywords)
• Commercial intent: Prioritising keywords where the searcher is likely to become a customer
• Difficulty: Focusing on keywords where the client has a realistic chance of ranking based on their current domain strength
• Relevance: Ensuring the keyword actually relates to the client's products or services

Weak Keywords (Medium Priority)

Keywords where the client ranks but competitors rank significantly higher. For example, if the client ranks position 15 but a competitor ranks position 3, there is an opportunity to close that gap through better content, improved on-page optimization, or targeted link building.

Untapped Keywords (Opportunity)

Keywords with decent volume that none of the analyzed competitors target particularly well. These are often long-tail or emerging keywords that represent first-mover opportunities.

Step 3: Content Gap Analysis

Beyond individual keywords, I analyze what types of content competitors create that drive their organic traffic:

Top Pages Analysis

Using SEMrush's top pages report, I identify each competitor's most successful content by organic traffic. This reveals:

• Which content formats work best (guides, lists, comparisons, tools)
• Which topics drive the most traffic
• How comprehensive their coverage is (word count, depth of treatment)
• Whether they use multimedia (video, infographics, interactive elements)

Content Freshness

I check how often competitors update their top-performing content. Pages that are regularly updated with fresh information tend to maintain or improve their rankings. If a competitor's top page was last updated two years ago, there is an opportunity to create a more current, comprehensive version.

Content Gaps

I map out the topics that competitors cover extensively and compare against the client's content library. The gaps — topics that competitors address but the client does not — become the foundation for the content strategy. For a deeper walkthrough of this process, see my dedicated content gap analysis guide.

Step 4: Backlink Gap Analysis

I compare backlink profiles to find link building opportunities:

• Shared referring domains: Sites that link to two or more competitors are the most accessible targets — they have already demonstrated willingness to link to content in the industry
• Unique referring domains: Sites that link to only one competitor may have exclusive relationships, but they are still worth pursuing if the client can offer better content
• Content-type analysis: What types of content earn the most links for competitors? Guides? Data? Tools? This informs the client's content strategy for link-earning.

Step 5: Technical Comparison

I compare technical SEO metrics across competitors to identify advantages and disadvantages:

• Page speed: How do competitor Core Web Vitals compare? If competitors are slow, fast page speed becomes a competitive advantage.
• Mobile experience: How do competitor sites perform on mobile devices?
• Schema markup: Do competitors use structured data? Are they earning rich results that the client is not?
• Site architecture: How do competitors organise their content? Is their navigation structure more logical?

Turning Analysis Into Action

The analysis is worthless without a clear action plan. My competitor analysis deliverable includes:

• Prioritized keyword opportunity list: Sorted by potential traffic impact and achievability
• Content recommendations: Specific pages to create or improve, with target keywords and competitive benchmarks
• Link building target list: Websites to pursue for backlinks, based on competitor link analysis
• Technical improvement priorities: Specific technical advantages to pursue
• 90-day action plan: Which opportunities to pursue first, second, and third — based on quick wins vs long-term investments

How Often to Run Competitor Analysis

I recommend a full competitor analysis at the start of any SEO engagement, then quarterly updates to track changes:

• Initial analysis: Full deep-dive as described above — forms the foundation for the SEO strategy
• Monthly checks: Brief review of competitor ranking changes included in monthly reports
• Quarterly refresh: Update the keyword gap and backlink analysis to capture new opportunities
• Annual re-evaluation: Full analysis to reset strategy based on how the competitive landscape has evolved

Common Mistakes in Competitor Analysis

• Analyzing too many competitors: Five is the practical maximum. More than that creates analysis paralysis without better insights.
• Copying competitors instead of learning from them: The goal is not to replicate their strategy — it is to identify opportunities they have found and do it better.
• Ignoring the "why": A competitor ranking well might have advantages (brand recognition, domain age, massive link profile) that you cannot quickly replicate. Understanding why they rank helps you assess which opportunities are realistic.
• Only looking at direct competitors: Some of the best insights come from adjacent industries or businesses in different locations that target similar keywords.

Competitor analysis is a core component of my Growth and Scale SEO service packages. It ensures that every piece of work I do for clients is informed by competitive intelligence, not guesswork.