Content Gap Analysis: How to Find the Topics You're Missing

A content gap analysis is the process of identifying topics and keywords that your competitors rank for — and that you do not yet cover. It answers the question: "Where are we leaving organic traffic and potential customers on the table because we have not published content that addresses what they are searching for?"

This guide covers how to conduct a content gap analysis systematically, what tools to use, and how to turn the findings into a prioritized content plan.

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Why Content Gap Analysis Improves SEO Strategy

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Most content strategies are built from the inside out: a business identifies the topics it wants to discuss and creates content around those topics. The problem with this approach is that it reflects what the business finds interesting, not necessarily what its audience is searching for.

A content gap analysis starts from the outside: what is the market already searching for? What content is your competition ranking for? Where is there search demand that currently gets satisfied by competitors but not by you?

This shift in perspective consistently uncovers high-value keyword opportunities that a purely internal content planning process would miss. It also reveals cannibalization risks — cases where you have multiple articles competing for the same keyword — and audience coverage gaps that explain why certain segments of potential customers are not reaching your site.

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Three Types of Content Gaps to Identify

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1. Competitor keyword gaps

Topics that competing websites rank for, that have genuine search volume, and that you have no content covering. These are the clearest opportunities — demand is proven (competitors are getting traffic), the topic is relevant to your audience, and you have not yet claimed your share.

2. Audience question gaps

Questions that your target audience asks in forums, communities, and search that are not answered by your existing content. These gaps often reflect the informational needs of early-stage buyers — the questions people ask before they are ready to evaluate solutions.

3. Topic coverage gaps

Areas within your existing topic clusters where specific subtopics are missing. If your SEO cluster lacks an article on technical audits, a competitor covering the same cluster may outrank you for searches in that subtopic simply because they offer more complete coverage.

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Step 1 — Identify Your True Competitors for Content Purposes

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Your content competitors are not necessarily your business competitors. For content gap analysis purposes, a content competitor is any site that ranks on the first page for keywords you are targeting — regardless of whether they sell a competing product.

Tools for identifying content competitors:

• Ahrefs Site Explorer → Competing Domains: Shows which domains rank for the most overlap with your current keyword set
• Semrush → Organic Research → Competitors: Similar competitor identification based on keyword overlap
• Manual search: Run 5–10 of your target keywords in Google and record which domains consistently appear on page one

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Select three to five content competitors that have meaningful keyword overlap with your topic area. Include one or two that are clearly more authoritative than your site — their keyword profiles reveal the full opportunity space you are working toward.

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Step 2 — Run the Gap Analysis

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With your competitor list established, run the keyword gap analysis:

Using Ahrefs Content Gap tool:

1. Enter your domain in Site Explorer
2. Navigate to Content Gap
3. Enter your three to five competitor domains
4. Filter for keywords where competitors rank in positions 1–20 and you do not rank at all (or rank below position 50)

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This produces a list of keywords your competitors are capturing that you are not. Export this list.

Using Semrush Keyword Gap tool:

1. Enter your domain and up to four competitors
2. Set filter to "Missing" — keywords where competitors rank but you do not
3. Sort by search volume and export

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Manual approach (for smaller sites):

Use Google Search Console to export all keywords you rank for. Export competitor content inventories using a site search (site:competitordomain.com) and manually identify topic categories you are not covering.

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Step 3 — Filter and Prioritize the Gaps

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A raw content gap analysis output can contain thousands of keywords. Not all gaps are worth filling. Apply these filters:

Remove irrelevant keywords: Keywords that are outside your topic area, branded to a competitor, or clearly not relevant to your audience's needs.

Check search intent alignment: For each remaining keyword, search it manually and review what type of content ranks. If the top results are all product pages and your site is a blog, that keyword may not be a content opportunity.

Assess keyword difficulty: Prioritize gaps where the competing content is beatable — moderate traffic with relatively low domain authority competitors, or topics where existing content is thin and outdated.

Prioritize by commercial relevance: A gap keyword with 500 monthly searches and direct relevance to your services is more valuable than a gap keyword with 5,000 monthly searches but no commercial connection.

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Step 4 — Turn Gap Findings Into a Content Plan

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Organize your filtered gap keywords into a content gap analysis output that your team can act on:

Group by topic: Cluster related gap keywords together. Multiple gap keywords about email segmentation suggest that one comprehensive article could close several gaps simultaneously.

Assign to content types: Some gaps suggest new articles; others suggest updates to existing thin articles; others suggest entirely new content categories that require pillar-page treatment.

Prioritize into a publishing queue:

• Tier 1: High search volume, moderate difficulty, direct commercial relevance — publish these first
• Tier 2: Moderate search volume, moderate difficulty, relevant to audience — include in regular publishing calendar
• Tier 3: Low volume, low difficulty, audience relevant — useful for topic completeness; include when capacity allows

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Set a publishing cadence for gap content: A content gap analysis is most valuable when it feeds directly into your content calendar with specific articles assigned to specific dates. A list of gaps that does not generate published content is just a research exercise.

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Running Content Gap Analysis Regularly

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A single content gap analysis is a snapshot. Running it quarterly ensures your content plan stays aligned with the evolving competitive landscape:

• Competitors publish new content that creates new gaps
• Your published content closes some gaps and opens others (when you rank for adjacent keywords)
• Search volume and difficulty for individual keywords shifts over time

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Quarterly reviews of a 3–4 competitor set take significantly less time than the initial analysis and keep the content strategy current without requiring a full annual planning cycle.

Blakfy conducts content gap analyses as part of content strategy engagements — identifying the specific topics and keywords that will generate the most organic traffic growth within a defined time period.

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Frequently Asked Questions

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How many competitors should I include in a content gap analysis?

Three to five competitors is the practical range. Too few produces a narrow gap list; too many produces noise. Include competitors that rank for topics directly relevant to your services — not the largest companies in your industry if they are in different topic spaces.

Should I try to close every content gap I find?

No. A content gap analysis identifies all the gaps; your strategy should prioritize the gaps with the best combination of search volume, difficulty, and commercial relevance. Trying to close every gap results in producing content across too many topics without developing depth in any area.

Can I do a content gap analysis without paid tools?

Yes, with limitations. Google Search Console shows what you rank for; a site search shows what competitors have published; manual comparison identifies the differences. Free tools like Google Keyword Planner and Ubersuggest can supplement the analysis. The output is less comprehensive than a paid tool analysis but still actionable.

What is the difference between a content gap analysis and a keyword research analysis?

Keyword research identifies all the keywords your audience searches for. Content gap analysis is a subset: it specifically identifies which of those keywords your competitors rank for that you do not. Gap analysis is more targeted and immediately actionable because it focuses on proven opportunities rather than the full keyword universe.