How many keywords can an SEO company target?
There is no fixed number, because the real limit is pages, not keywords. Each page can serve one main topic and the searches closely related to it, so the number of keywords a campaign can genuinely work on depends on how many pages your site has, or will have, and how many of them the budget can build or improve well. A campaign for a small local site may rest on a few dozen searches; a large store or publisher may cover far more. A useful answer from a company describes topics and the pages that serve them, not a headline count.
Why counting variations inflates the list
A keyword list can be made to look large by counting plurals, reordered phrases, and near-identical wordings as separate targets. Google’s description of how it ranks results explains why that adds nothing: it refers to “our sophisticated synonym system that allows us to find relevant documents even if they don’t contain the exact words you used.” A page that answers a question well can be found for different ways people phrase it, so listing each phrasing as its own target measures the list, not the work.
The same page also states: “The most basic signal that information is relevant is when content contains the same keywords as your search query.” Matching the words people use still matters, which is why each page has a main topic that appears in its title and headings. But it is the starting point, not a reason to build a page for every variation.
What sets the real number
Pages set the first limit: a site with eight pages cannot seriously compete for hundreds of distinct topics, because there is nowhere for them to live; expanding coverage means adding pages, such as service, location, product, or guide pages that each have a reason to exist.
Budget sets the second, because every topic added needs research, a page written or rewritten to cover it properly, internal links, and monitoring. A smaller budget is better spent on a short list of topics done well than on a long list covered thinly.
Tracking is not targeting
Rank tracking tools can follow a site’s position for thousands of phrases automatically. That is monitoring, not work: a phrase is targeted only when a page has been built or improved to answer it. When a company quotes a large number of keywords, ask how many of them have a page assigned and what was done to each page.
Checking the list against real searches
Search Console’s Performance report can be filtered by page to show the queries for which each page already appears. That list shows which searches Google already associates with a page and where its coverage stops. A sound keyword plan uses it: it assigns each target topic to a page, shows the searches the page already gets, and names the ones it is meant to win next.