Two types of content gap: keyword gaps and entity gaps
Most content gap analysis tools focus on keyword gaps — specific search terms your competitors rank for that you do not. This is useful but incomplete. The more strategically important gap is the entity gap: the concepts, questions, and related topics that your competitors cover in depth but your site treats superficially or ignores entirely.
A keyword gap tells you that your competitor ranks for "content brief template" and you do not. An entity gap tells you that your competitor's content on content strategy covers the full entity set — briefs, gap analysis, audits, calendars, topical maps — while your content covers only topical maps. Google's NLP systems assess topical authority based on entity coverage, not just keyword presence. A site that covers the full entity set for a topic cluster signals deeper expertise than one that covers only the most popular entry points.
An effective content gap analysis addresses both types. The keyword gap identifies specific new pages to create; the entity gap identifies existing pages to deepen and new topic clusters to develop.
How to conduct a content gap analysis: the four-step process
Step 1: Identify your true organic competitors
Your organic competitors are not necessarily your business competitors — they are the sites that rank for the same keywords you are targeting. A large agency may be your business competitor but not your organic competitor if they target different keywords. Use your primary keywords in Google and note which sites appear consistently in the top 10 — these are your organic competitors for gap analysis purposes.
Step 2: Extract competitor keyword coverage
Use a tool like Ahrefs (Site Explorer → Competing Domains → Content Gap), SEMrush (Keyword Gap tool), or Screaming Frog to extract the keywords your competitors rank for. For entity gap analysis, crawl their content and extract the H2s and H3s — these reveal the topic structure and entity coverage of their content library.
Step 3: Identify your gaps
Compare competitor keyword coverage against your own. Keywords that two or more competitors rank for in positions 1–20, but that your site does not rank for at all, are your highest-priority keyword gaps. For entity gaps, compare the H2/H3 topic lists from competitor content against your own — topics that appear consistently in competitor content but not in yours are entity gaps.
Step 4: Prioritise by impact
Not all gaps are worth filling. Prioritise by: (1) search volume — higher volume gaps produce more traffic when filled, (2) commercial intent — gaps in decision-stage content produce more conversions than awareness-stage gaps, (3) topical relevance — gaps in your core topic cluster strengthen topical authority more than gaps in peripheral topics, and (4) competitive difficulty — gaps where the top-ranking content is thin or outdated are easier to fill.
Content gap analysis vs topical map: how they relate
A topical map is a proactive content architecture — it defines the full entity set for your topic cluster and plans the pages needed to cover it comprehensively. A content gap analysis is a reactive diagnostic — it identifies what your competitors have already built that you have not.
The two approaches are complementary. A topical map ensures you build a coherent, internally linked content architecture; a content gap analysis ensures you do not miss high-value topics that competitors have already validated. For most businesses, the right sequence is: build the topical map first (to define the architecture), then run a content gap analysis (to identify any high-value competitor topics the map missed).
From our work
A consistent finding in content gap analyses for professional services businesses: the highest-value gaps are almost always in the decision and consideration stages of the buyer journey — comparison articles, pricing guides, and "how to choose" content. These pages are often absent from the client's site because they feel commercially sensitive to write, but they are exactly the pages that convert searchers who are close to making a buying decision. Filling these gaps typically produces a disproportionate improvement in lead quality relative to the content investment.
Tools for content gap analysis
| Tool | Best for | Cost |
|---|---|---|
| Ahrefs Content Gap | Keyword-level gap analysis — shows keywords competitors rank for that you don't | From $129/month |
| SEMrush Keyword Gap | Side-by-side keyword comparison across up to 5 competitors | From $139/month |
| Google Search Console | Free — shows your own keyword performance; use alongside competitor tools | Free |
| Screaming Frog + custom extraction | Entity gap analysis — crawl competitor H2/H3s to map topic coverage | £149/year (paid) or free up to 500 URLs |
| Manual SERP analysis | Quick entity gap check — search your primary keywords and review top-10 H2 structures | Free |
Frequently asked questions
What is a content gap analysis in SEO?
A content gap analysis identifies topics, keywords, and questions that your competitors rank for but your site does not cover. It reveals the content your target audience is searching for that you are not currently providing — the gaps in your topical coverage that are costing you traffic and authority.
How do I do a content gap analysis?
The process has four steps: (1) identify your top three to five organic competitors, (2) extract the keywords and topics they rank for, (3) compare their keyword coverage against yours to identify what they rank for that you do not, and (4) prioritise the gaps by search volume, commercial intent, and topical relevance.
How often should I run a content gap analysis?
For most businesses, a content gap analysis every six to twelve months is sufficient. Run it more frequently if you are in a fast-moving industry, if a major competitor has recently launched new content, or if your rankings have declined unexpectedly.
Freelance SEO & AI Consultant — London
Semantic SEO Specialist · Koray Framework Practitioner · Content Intelligence
I conduct content gap analyses as part of content strategy engagements for London businesses — keyword gap identification, entity gap mapping, and prioritised content roadmaps. About me →
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