Content Gap Analysis: How to Find Keywords Your Competitors Rank For

Every ranking your competitor holds is a data point. It tells you what searchers in your market are looking for, and it tells you which topics Google has already confirmed as valuable enough to surface. Content gap analysis turns that competitor data into your content roadmap — systematically identifying the keywords and pages they rank for that you don't, so you can close the gap strategically rather than guessing what to write next.

What content gap analysis is

A content gap is a keyword or topic that your competitor ranks for in Google — typically in positions 1–20 — for which you have no page, or no page that ranks. The 'gap' is the delta between their organic visibility and yours. Content gap analysis is the process of systematically identifying those gaps, prioritising them by commercial relevance, and creating content that fills them. It's one of the highest-leverage SEO activities because the keyword research is already validated: Google is already sending traffic to that topic.

Why it matters: your competitors' rankings are your market map

Building a keyword list from scratch requires you to guess what your market is searching for, then validate that guess with volume data. Content gap analysis skips the guessing step. If three competitors all rank for a keyword, that keyword has proven demand, proven searcher intent, and at least one working content format you can study. You're not discovering keywords — you're harvesting a validated list that your most successful competitors have already spent time and money to rank for.

Tools for content gap analysis

• Ahrefs Content Gap tool: enter your domain and up to five competitor domains — Ahrefs returns every keyword where competitors rank but you don't, filterable by volume, difficulty, and position
• Semrush Keyword Gap: similar functionality to Ahrefs, with a 'missing' filter that shows keywords where you have zero ranking and competitors do — particularly useful for discovering entirely absent topic areas
• Google Search Console (for existing content gaps): filter your GSC data for queries where your average position is 11–30 — these are pages Google already associates with a topic but doesn't rank highly, which often means a content upgrade is more efficient than creating new content
• Manual SERP analysis: for smaller-scale analysis, simply type your target keyword into Google and identify the ranking pages — check which site has that page and whether you have an equivalent

Step 1: identify your real competitors (not the ones you think)

Your SEO competitors are not necessarily your business competitors. Your SEO competitors are the domains that consistently appear in Google when your target customers search. For a B2B SaaS company, the competitors in Google might include industry blogs, specialist media publications, and tool-comparison sites — none of which compete with you commercially, but all of which compete with you for organic visibility. Run an Ahrefs or Semrush organic competitors report to see which domains share the most keyword overlap with yours — those are your real SEO competitors to analyse.

Step 2: run the content gap report and filter the output

A raw content gap export typically contains hundreds or thousands of keywords. Most of them won't be worth pursuing. Apply these filters to cut the list to a workable size: minimum 100 monthly searches (below that, traffic impact is negligible unless the keyword is extremely high-intent), maximum keyword difficulty of 40 (above that, you'll need significant domain authority to compete), and exclude branded keywords (searching for a competitor's brand name won't result in traffic to your site). What remains is your prioritised gap list.

Step 3: categorise gaps by type

• Missing topic areas: entire subject clusters your site doesn't cover — the highest priority, as they represent structural gaps in your content strategy
• Thin or absent coverage: you have one paragraph on a topic they have a full guide for — an expansion opportunity, not a new-page requirement
• Format gaps: they have a comparison table, a calculator, or an interactive tool for a topic you cover in a standard article — improving the format can flip the ranking without rewriting the content
• Location or segment gaps: they have city-specific or industry-specific pages for queries you cover generically — programmatic expansion can close these efficiently

Step 4: prioritise gaps by volume × difficulty × business relevance

Not all gaps are equal. A keyword with 5,000 monthly searches, KD of 15, and direct relevance to your product is dramatically more valuable than a 500-search, KD 5 keyword on a tangentially related topic. Create a simple scoring matrix: volume score (1–5) × difficulty score (5 = easiest) × relevance score (1–3). Sort descending. The top 20 items in that sorted list are your next quarter's content roadmap. Review it quarterly as rankings shift.

Step 5: analyse the ranking page before writing

Before creating content for a gap keyword, study the page that currently ranks. What format is it? How long is it? What questions does it answer? What does it include that competitors' pages don't? What does it miss? Your goal isn't to copy the ranking page — it's to understand why Google chose it and then create something that satisfies the same intent more completely. Look at the top three ranking pages for each keyword and identify the common structure, then improve on it.

How to create content that beats the existing ranking page

• Go deeper: if the ranking page has 10 bullet points, write 15 — with explanations for each, not just longer bullets
• Add original data or examples: statistics from your own client data, real screenshots, case study numbers — original data attracts backlinks and signals E-E-A-T
• Improve structure: use a clear table of contents, consistent heading hierarchy, and summary boxes — these improve dwell time and reduce pogo-sticking back to the SERP
• Match the exact search intent: re-read the query from the searcher's perspective and ask whether your content answers it within the first scroll — if not, reorder your content
• Update it: many ranking pages are 3–5 years old — a 2026 guide that references current tools, current algorithm updates, and current pricing will signal freshness

Tracking gap-filling progress

Once gap-filling content is published, track it in a simple spreadsheet: keyword, target URL, date published, current position (updated weekly from Search Console or Ahrefs), and traffic trend. Expect 3–6 months before new content settles into stable rankings. If a page hasn't moved above position 20 after 6 months, revisit it — either the content needs improvement, it needs more internal links, or the keyword difficulty was underestimated.

Using Search Console as a free gap-analysis tool

Google Search Console's Performance report shows every query your site appears for in search results — including queries where you rank in positions 11–50 that you may not be aware of. Filter for queries with impressions but low clicks (positions 11–30). These represent pages Google already considers topically relevant but not quite good enough to rank high — upgrading existing content for these queries is often faster than creating new pages from scratch. Run this analysis every 90 days as your content estate grows.

Content gap analysis for e-commerce and programmatic sites

For e-commerce stores, content gaps often manifest as missing category pages, missing product comparison pages, or missing buying-guide content that competitors use to capture top-of-funnel searches. A competitor ranking for 'best running shoes for flat feet' with a dedicated guide page while you only have a product listing page is a content gap — the fix is to create the guide, link it to relevant products, and capture the informational search traffic that the listing page cannot rank for. For programmatic SEO sites, gap analysis reveals which location or category combinations competitors cover that you haven't built pages for yet.