Content gap analysis

A content gap analysis compares your rankings to competitors and identifies topics and queries where they rank and you don't. It's one of the highest-leverage activities in SEO strategy.

What a gap analysis reveals

• Queries your competitors rank for that you don't (pure gaps)
• Queries you rank for but below them (close-the-gap opportunities)
• Topics they cover that you've missed entirely (strategic gaps)
• Formats they use that you don't (format gaps)

Types of gap analysis

1. Keyword gap

The classic. In Ahrefs: Competitive Analysis → Content Gap. Enter 2-4 competitors + yourself. The tool returns keywords they rank for but you don't.

Filter by: search volume, KD, position (competitors ranking in top 10, you not ranking at all or ranking low).

2. Topic gap

Higher-level than keywords. What entire topic areas do competitors cover that you don't?

Process:

1. Visit competitor blogs/resource centers
2. Note their top-level categories
3. Compare to yours
4. Identify missing areas that fit your audience

3. Content depth gap

Competitors have "SEO for ecommerce" as a pillar topic with 15 cluster pages. You have 2 articles. The gap isn't "we don't cover it", it's "we don't cover it deeply enough."

4. Format gap

Competitors are winning featured snippets with lists. You're writing paragraph articles. Same topic, different format wins the SERP.

5. Freshness gap

Your content covers the right topics, but competitors updated theirs recently. Google favors fresh = their ranking rising, yours dropping.

The workflow

Step 1: Pick competitors

Not business competitors. SEO competitors. Who appears in the top 10 for your priority queries? Those are the sites to analyze.

Step 2: Pull their top-performing content

Each competitor's top 100-200 pages by organic traffic. Ahrefs/SEMrush → Top Pages.

Step 3: Run keyword gap

Cross-reference: keywords they rank for top 20, you rank for 50+ or not at all. Filter by volume (>100/mo) + relevance.

Step 4: Categorize

Sort gap keywords by topic. This reveals topic-level gaps.

Step 5: Prioritize

Volume + difficulty + commercial value. Pick the top 20-50 opportunities.

Step 6: Plan

Each opportunity becomes a content brief. Assign to writers.

Gap analysis tips

• Check 3-5 competitors, not just one. One competitor's strong areas might be idiosyncratic; recurring gaps across 3+ are more reliable signals.
• Include both direct business competitors + content-only competitors (industry blogs, SaaS comparison sites).
• Look at their traffic trends too, a page losing traffic isn't as good a target as one gaining.
• Check backlinks on their top pages, highly-linked pages might be hard to outrank; lightly-linked ones are opportunities.

Gap vs, cannibalization

Some "gaps" are really pages you have that rank poorly. In that case, the fix isn't a new page, it's improving the existing one. Check Search Console for queries you already get impressions for before writing new content.

Tools

• Ahrefs Content Gap, fastest
• SEMrush Keyword Gap, similar
• Manual: export your rankings + competitor rankings, VLOOKUP in spreadsheet

Cadence

Run a formal gap analysis quarterly. It's too time-consuming to do monthly, too rare if done annually. Competitive landscapes shift fast.