How to Do a Content Gap Analysis

A content gap analysis is how you find the valuable keywords and topics your competitors rank for and you don't — then decide, in priority order, which ones are worth creating. Done properly it turns a vague "we need more content" into a ranked, evidence-backed plan built on real search demand rather than guesswork. Here is exactly how to run one, the tools that make it fast, and the question-and-entity gaps that now matter for AI answers.

What a content gap analysis actually is

A content gap analysis compares your site's coverage against your competitors — and against genuine search demand — to surface the topics, questions, and keywords where you have no page, a thin page, or a page that simply ranks poorly. The "gap" is the distance between what your audience searches for and what your site currently answers well.

In practice, gaps come in a few shapes. A keyword gap is a specific query competitors rank for and you don't. A topic gap is a whole subject or subtopic missing from your site. An intent gap is a page that exists but answers the wrong need — an explainer where searchers want to buy, or the reverse. And a format gap is when competitors win with a comparison, calculator, or template you never built. Naming the type of gap matters, because each one points to a different fix.

How to run a content gap analysis, step by step

The process is methodical, and the same seven steps work whether you run it inside Ahrefs, Semrush, or by hand:

1. Identify your real competitors. These are your search competitors, not just your business rivals. Look at who actually ranks on page one for your core terms — a niche blog or marketplace can be a bigger content competitor than a direct commercial rival.
2. Pull their ranking keywords. Export the organic keywords each competitor ranks for from a tool like Ahrefs or Semrush. This is your universe of demand — every query someone in your market is already being served for.
3. Compare it against your own coverage. Run those competitor keyword sets against your domain using a Content Gap or Keyword Gap report, and cross-check with Google Search Console to see what you already earn impressions for.
4. Isolate the genuine gaps. Filter to queries where one or more competitors rank in the top ten and you either don't rank at all or sit stranded beyond page two. Cluster the survivors into topics rather than treating each keyword alone.
5. Map every gap to search intent. Label each cluster informational, commercial, transactional, or navigational, and decide the format that intent demands — a guide, a comparison, a product page, or a tool.
6. Prioritise by value and difficulty. Weigh each opportunity by search demand, business relevance, keyword difficulty, and the authority you already hold. High-relevance, winnable topics come first; high-volume but hopeless ones wait.
7. Build the plan. Turn the shortlist into a content calendar of new pages to write, existing pages to expand or re-optimise, and thin pages to consolidate — each with a target query, an intent, and an internal-linking home.

The types of gap at a glance

The tools that make it fast

Three tools cover almost every content gap analysis. Ahrefs and Semrush both offer dedicated gap reports — Ahrefs calls it Content Gap, Semrush calls it Keyword Gap — that take several competitor domains and show, side by side, the keywords they rank for and you don't. If you're weighing which platform to standardise on, my Ahrefs vs Semrush comparison breaks down where each is stronger for exactly this job.

Google Search Console is the free third pillar, and the one people skip. It shows the queries you already earn impressions for, with position and click data, so you can find "striking distance" gaps — pages ranking on the edge of page one that a small update could push up. Combining the two views — competitor demand from Ahrefs or Semrush, your own reality from Search Console — is what separates a real analysis from a keyword dump.

Underneath all of it sits topical authority: gaps are only worth filling if they build depth around subjects you can credibly own, so read the exports through that lens rather than chasing every unrelated keyword a competitor happens to rank for.

Don't forget the AEO and GEO gaps

Classic gap analysis stops at keywords. Search no longer does. Two newer gaps decide whether you show up in answer boxes and AI-generated answers.

The first is the question gap. Mine People Also Ask, forum threads, and the follow-up questions AI engines suggest, then check which ones your content answers directly. Each unanswered question is a chance to win a snippet or be cited — ideally with a concise 40-to-60-word answer under a question-shaped heading. Structuring pages this way is part of a solid on-page SEO checklist, not an afterthought.

The second is the entity gap. AI answer engines reason about entities — the people, brands, products, and concepts a topic touches — so a subtopic or related entity you never mention is a gap even when no keyword tool flags it. Covering a topic's full entity map is how you signal genuine authority to both Google and the generative engines that now sit above it.

Working with me

I'm a Senior SEO / AEO / GEO Specialist, and a content gap analysis is usually where I start an engagement — it's the fastest way to turn a stalled content programme into a ranked, defensible plan. If your search presence needs rebuilding from the technical foundation up before new content can rank, that's the SEO reboot. Either way, tell me in one paragraph what you're trying to rank for, and I'll tell you honestly where your biggest gaps — and quickest wins — actually are.