What are SEO stop words and should you worry about them?

In your efforts to optimize your website for search engines, you may have come across the concept of SEO stop words.

But what are SEO stop words? How do they impact your SEO? And should you worry about them in your SEO strategy? The honest answer has actually changed since this article was first written. Google's own algorithms no longer treat stop words the way they used to, and that shift is worth understanding before you decide whether to strip them out of anything.

What are SEO stop words?

Stop words are common words that older search and text-indexing systems would often ignore, both in search queries and in the content they indexed. Think articles, prepositions, conjunctions, and pronouns. Words like "the," "any," "in," or "a." The term itself predates modern SEO entirely: it was coined by IBM researcher Hans Peter Luhn back in the 1950s to describe words that early information retrieval systems filtered out to save processing power.

See this comprehensive list of SEO stop words from Semrush if you want the full reference.

Stop words typically don't change the meaning of a query, but are definitely needed in your content to properly structure sentences. That said, "typically" is doing some work in that sentence, and the next section explains why.

Do search engines still ignore stop words?

This used to be a simple yes. Older search algorithms processed queries word by word and discarded low-value filler to focus on the words that seemed to carry meaning. That changed in October 2019, when Google rolled out BERT, a natural language model that reads an entire query in context instead of parsing it word by word.

Google's own example from that announcement is the clearest way to explain why this matters. The query "2019 brazil traveler to usa need a visa" contains a stop word, "to," that completely determines the meaning of the search. Before BERT, Google's algorithm effectively ignored "to" and returned results about US citizens traveling to Brazil. After BERT, Google correctly understood that a Brazilian traveler was asking about a US visa, the opposite direction entirely.

BERT was only the beginning. Google's MUM model arrived in 2021 to handle even more complex, multi-part questions, and the AI Overviews that now sit at the top of many search results depend on the same kind of full-sentence language understanding. None of these systems work by stripping small words out of a query and matching the rest against an index. They read the whole thing, prepositions and all.

So the honest, current answer is: search engines still process common words differently than rare ones, but "ignore" is the wrong word for what happens today. Stop words can carry real meaning, and Google's algorithms are specifically built to notice when they do.

Where to use (or not use) stop words

None of this means you should start cramming extra articles and prepositions into your content for good measure. The practical guidance below has held up reasonably well, it just rests on a different foundation than it used to: readability and clarity for actual readers, rather than assumptions about how search engines parse text.

Page URLs

As far as your page URLs, a simple structure is still best. Often, your CMS will automatically pull your page title into your page URL, which can make it rather long. Trimming filler words here is reasonable, but it is worth being precise about why: Google's own URL structure guidance does not instruct anyone to strip stop words specifically. It asks for descriptive, human-readable URLs that use hyphens between words. Removing an unnecessary "a" or "the" is often a natural side effect of that goal, not a rule in itself. Just make sure that what you remove doesn't change the meaning of the keywords left behind, especially prepositions.

Page titles and headers

When it comes to page headings and the title tags that show up on search engine results pages, it is still a best practice to leave these words in. They show up in search results, and removing them makes for an awkward reading experience for users deciding whether to click through to your website. Prioritize the user experience here, the same way you would in a sentence you were writing for a person rather than a machine, because that is functionally what you are doing now.

Body content

In a similar sense, you should never strip these words from your body content. Yes, you want to improve your SEO every chance you get, but your body content is what users are actually looking for, and it is also what Google's Helpful Content system is evaluating when it decides whether your page is written for people or for algorithms. Stop words are needed for the best possible reading experience, and modern ranking systems are specifically designed to reward natural writing over mechanically stripped-down text.

All in all, you shouldn't worry too much about these words in your SEO strategy. The primary focus should still be user experience first, followed by SEO best practices after, it's just that in 2026, those two things overlap more than they used to rather than pulling in different directions.

Find out if you're making any of these 13 common mistakes with your SEO, check out our 13 tips to get your website indexed by Google faster, and if you want a broader refresher, see our 8 steps to create an effective SEO strategy and the difference between on-page and off-page SEO.

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