A long-tail keyword is a specific search phrase with a small number of searches a month, as opposed to a broad head term with many. Fireworks is a head term; quiet fireworks for a wedding in October is long tail. Long-tail phrases are less contested, so a small site can rank for them, and they are usually typed by someone closer to buying.
Where the name comes from
From the shape of the demand curve. A few phrases are searched enormously often, then the curve drops away into a very long tail of phrases each searched a handful of times. Added together, the tail is larger than the head. The phrase was borrowed from a 2004 essay about retail and stuck.
Why they are easier
Fewer pages target them, and the pages that do are often weak. A specific phrase also lets a specific page match it precisely, in title, heading and first sentence, which a broad page cannot do for every variant. Google's guidance is that words in the URL alone matter little, but a page that is plainly about one narrow thing is easy to rank for that thing.
Why they convert
Because specificity is intent. Someone typing fireworks might be a child doing homework. Someone typing wedding fireworks price per minute Berkshire has a date, a venue and a budget. Fewer visitors, far more customers.
How to find yours
Search Console already knows them. Filter the queries report to phrases with impressions, a position between roughly five and twenty, and four or more words. Those are questions Google already thinks you half-answer. Give each its own page, or its own heading on the page that nearly ranks, and track them. The keyword tool's search volume will often say ten or fewer. Track them anyway; ten searches for exactly what you sell beats a thousand for something vague.
Where this shows up in the tracker
Every term in this glossary is something the product actually measures or acts on. Plans start at £29 a month, with rank tracking, AI visibility, the daily AI readiness scan, security and domain health, Search Console, backlinks and audits on every one of them.
Related terms
Bottom-of-funnel keyword
A bottom-of-funnel keyword is a search typed by someone who has finished researching and is choosing a supplier: a service plus a place, a product plus a price, a brand versus another brand, near me, cost, quote, book. They are a small fraction of all searches and most of the revenue. For a small business they are the right place to start.
KD
Keyword difficulty is a score, usually from zero to a hundred, that an SEO tool assigns to a search phrase to estimate how hard it would be to rank on the first page. It is calculated mainly from the link strength of the pages already ranking. It is not a Google metric, every tool computes it differently, and it is a rough guide rather than a verdict.
Topic cluster
A topic cluster is a set of pages that each answer one specific question about a subject, all linking to and from a central page that covers the subject as a whole. The central page is called a pillar or cornerstone page. The structure works because it concentrates internal links and relevance around one topic, which is how a site comes to rank for the whole of it rather than for scattered phrases.
Striking distance
Striking distance keywords are the ones ranking just below where the traffic is, usually positions four to fifteen. They are the cheapest improvements available to most websites, because the hard part is already done.