Competitor Keyword Analysis: A Practical Workflow

Competitor keyword analysis finds gaps between what your site ranks for and what other sites already rank for on terms relevant to your business. This guide covers the actual workflow: identifying who your real search competitors are, running the gap analysis, filtering the noise out of the results, and turning what’s left into a prioritized content plan. It doesn’t promise to help you “dominate” anything; a gap tool shows you what’s possible to target, not a guarantee of outranking anyone.

Identifying Real Competitors

The single most common mistake in this process happens at the very first step: conflating who you compete with commercially and who you compete with in search. These are often different lists.

Perceived/business competitors are companies you think of as your competition: similar size, similar service area, similar positioning, the businesses that come up when someone asks “who else does what you do.” SERP-based competitors are whichever sites actually rank for the specific terms you care about, which can include national brands, review aggregators, directories, and content sites that aren’t commercial competitors at all but still occupy the ranking positions you want.

To build the correct list, search your 10 to 15 highest-priority target keywords directly and record which domains actually show up in the top results across most of them. A domain that appears repeatedly across your target keyword set is a real SERP competitor, regardless of whether you’d have named them if asked “who’s your competition” without looking. Conversely, a company you consider a fierce business rival might barely appear in your target search terms at all, if their growth comes from referrals, paid ads, or a different channel entirely rather than organic search.

Run the gap analysis against the SERP-based list. The business-competitor list matters for other parts of a company’s strategy, but it’s the wrong input for a keyword gap tool.

A concrete example of how these two lists diverge: a regional accounting firm might name three other local accounting firms as their competition when asked directly. But a search for their actual target keywords (“small business tax prep [city],” “bookkeeping services for contractors”) might surface a national franchise, a personal-finance content site, and a directory listing service in the top results more consistently than any of the three local firms they named. The gap analysis against the correct list surfaces genuinely different, more useful opportunities than one run against the list built from memory and reputation alone.

It’s also worth checking this list periodically rather than treating it as fixed. SERP competitors shift as sites gain or lose authority, as new entrants target the same terms, and as Google’s own ranking behavior evolves for a given query category. A competitor list built a year ago may no longer reflect who’s actually occupying the positions you’re trying to reach.

Running the Gap Analysis

Ahrefs’ Content Gap tool and Semrush’s Keyword Gap tool both work on the same underlying principle: they compare your site’s set of ranking keywords against one or more competitor domains and surface the keywords those competitors rank for that you don’t.

Ahrefs’ Content Gap takes the full set of keywords a competitor ranks for and subtracts the keywords your own site ranks for, leaving a list of terms you’re not currently targeting at all. It supports comparing against multiple competitor domains simultaneously. Read the gap output at two levels: domain-level (a competitor covers an entire topic area you don’t touch at all) and page-level (you and a competitor both have a page on the same topic, but their page ranks for meaningfully more keywords than yours does), a distinction worth checking against Ahrefs’ current interface before a client-facing analysis, since tool UIs shift.

Semrush’s Keyword Gap works similarly, letting you compare your domain against up to four competitor domains at once (five domains total including your own), filtered by organic, paid, or shopping (PLA) keyword types. It surfaces overlapping keywords (terms you both rank for), your unique keywords, and the competitive gap specifically (terms competitors rank for that you don’t).

Both tools’ interfaces and exact naming shift periodically as the vendors update their products, so treat the mechanics described here as the current state at time of writing, and confirm the specific workflow against the tool’s own current documentation before running a large analysis. The underlying logic (your ranking set minus theirs equals the gap) is stable even when the interface around it changes.

Running the analysis against more than one competitor at once, which both tools support, is usually more useful than a single-competitor comparison. A term that only one competitor ranks for might be a one-off, low-value target unique to that site’s specific content strategy. A term that multiple, otherwise-different competitors all rank for is a stronger signal that real, broad-based demand exists in that space and that building content for it is a reasonably safe bet rather than chasing a single competitor’s idiosyncratic content choice.

Filtering for Relevance

Raw gap output is mostly noise. A gap report run against even one real competitor commonly returns hundreds or thousands of rows, and the large majority of them won’t be worth pursuing: terms the competitor ranks for by accident of broad site authority rather than deliberate targeting, terms with no realistic connection to your business, and terms where the competitor’s ranking reflects years of accumulated authority you have no near-term path to matching.

Filter the raw list down using the same relevance-first logic that applies to any keyword list: does this term describe something you actually offer or answer? Cut anything that doesn’t pass that test before spending any more time evaluating it. Only after the relevance cut does it make sense to look at volume, difficulty, or business value for what remains, since scoring irrelevant terms is wasted effort regardless of how attractive their numbers look.

The noise in a raw gap report generally falls into a few recognizable categories, worth scanning for specifically rather than reviewing the list purely row by row:

• Adjacent-but-irrelevant terms. A competitor with broader service offerings than you ranks for terms tied to services you don’t actually provide.
• Brand and navigational terms. The competitor’s own branded searches, and searches for their specific product names, show up in their ranking set but have no realistic path or reason for your site to target them.
• Breadth-of-authority artifacts. Large, high-authority competitor sites rank for an enormous tail of loosely related terms simply because their overall domain strength lifts nearly everything they publish, not because those specific terms represent a deliberate or replicable content strategy.
• Geographic mismatches. A national or out-of-area competitor ranks for location-modified terms tied to a region you don’t serve.

None of these require a tool to catch, just a relevance pass against the list with these categories in mind before moving to volume or difficulty scoring.

Prioritizing What’s Left

Once the list is filtered to genuinely relevant gap terms, prioritize using the same underlying logic used for any keyword list: relevance, realistic ranking feasibility given your site’s current authority, and business value if you ranked. This isn’t a separate framework specific to competitor analysis; it’s the same scoring logic applied to a different source list. A gap term that scores well here deserves a place in the content plan; one that scores poorly (unrealistic difficulty, weak business fit) gets cut regardless of how impressive the competitor’s ranking for it looks.

Turning Gaps Into a Content Plan

Each surviving, prioritized gap keyword needs two decisions before it becomes a content asset: what page type or format actually fits the keyword’s intent, and whether an existing page on your own site already covers close to the same ground.

That second check matters more than it might seem. Creating a new page for a competitor gap term without first checking your own site risks creating a cannibalization problem instead of solving a competitive one, if a page addressing a similar topic already exists. Check your own site first, using the same detection approach used for diagnosing cannibalization generally, before building something new. If nothing overlaps, the gap term becomes a new content brief matched to the page type its intent calls for: a comparison page, a service page, an FAQ entry, whatever fits what’s actually ranking for that term in the current SERP.

One Honest Limitation

Gap tools show what competitors rank for. They don’t show why a competitor built that content, and they don’t show whether the ranking is actually working for the competitor’s business. A competitor can rank position 8 for a term that sends them close to zero real traffic and zero business value, because the term has low search volume, high competition for the click, or poor alignment with what that competitor actually sells. Seeing a term in a gap report is a starting signal, not evidence that pursuing it is automatically worthwhile. That judgment still requires the same relevance, feasibility, and business-value filtering described above, applied honestly rather than skipped because a term showed up on a competitor’s list and therefore “must” be worth targeting.

This limitation is worth stating plainly to whoever is going to act on the analysis, whether that’s a client, a stakeholder, or your own content team. A long gap-report list can create pressure to treat every row as a validated opportunity simply because a competitor is already capturing it. Push back on that framing. The report tells you what’s technically possible to target and what a specific competitor happens to already rank for; it doesn’t tell you what’s actually worth your limited content production time, and conflating the two produces a content calendar built around chasing competitors rather than serving your own audience’s real demand.

Summary Workflow

Step	What it does	Common mistake to avoid
1. Identify real competitors	Search your priority terms directly, record who actually ranks	Using your perceived business-competitor list instead of who actually ranks
2. Run the gap analysis	Compare your ranking keyword set against competitor domains	Trusting outdated descriptions of tool mechanics instead of checking current documentation
3. Filter for relevance	Cut terms with no real connection to your business	Scoring difficulty/volume on terms that should have been cut for relevance first
4. Prioritize	Score by relevance, feasibility, business value	Chasing every gap term equally instead of ranking them
5. Build the content plan	Match format to intent, check for internal overlap first	Creating a new page without checking whether one already exists on the topic

Competitor keyword analysis is a genuinely useful discipline for surfacing terms you wouldn’t have found through internal seed generation alone. It isn’t a shortcut to guaranteed rankings, and gap-report volume by itself doesn’t establish that a term is actually worth pursuing. The workflow above (correct competitor list, accurate gap mechanics, honest filtering, and a check against your own site before publishing) is what separates a useful competitive analysis from a long list of keywords nobody ends up acting on.