If you have spent any time reading SEO advice, you have run into LSI keywords. The usual pitch goes like this: find a list of words related to your main keyword, sprinkle them through your content, and Google will see your page as more relevant. It sounds technical enough to be true, and tools have sold “LSI keyword generators” for years on exactly that promise. Here is the part most articles leave out. Google has stated repeatedly that LSI keywords are not a thing it uses, and the people who study how search actually works agree. The instinct behind the advice is reasonable. The label and the mechanism are wrong.
That distinction matters, because chasing a myth can push you toward keyword stuffing, which is one of the faster ways to get a page demoted under current standards. Understanding what is real here will make your content better and save you from optimizing for something that does not exist.
Where the Idea Came From
Latent Semantic Indexing is a genuine technology. It came out of the 1980s as a way to analyze relationships between words across small, static sets of documents. For its time and purpose it worked. It was never built for the scale, diversity, and constant change of the modern web, and Google’s founders recognized early that an LSI-style approach could not rank billions of pages across countless topics and languages.
So how did the term end up everywhere in SEO? Timing. When marketers realized that stuffing a single keyword no longer worked, they needed a way to talk about using related terms, and “LSI” became a convenient shorthand for that shift. The phrase sounded like it came from a research lab, tools built features around it, and the idea spread faster than anyone could correct it. The advice underneath was fine. The branding attached the wrong name to it.
What Google Has Actually Said
Google’s position is not subtle. Back in 2019, Google’s John Mueller responded to a question about the practice by saying there is no such thing as LSI keywords, and that anyone telling you otherwise is mistaken. He has repeated the point since, noting that the advice was still wrong years later.
This was backed by people with no reason to flatter Google. Bill Slawski, who spent years reading Google’s patents and papers, pointed out that none of them describe LSI keywords as an effective ranking technique, and that the semantic topic models Google does research have nothing to do with the “LSI keywords” sold in SEO circles.
What Google uses instead is far more sophisticated. The 2013 Hummingbird update shifted the focus from rigid keyword matching to overall meaning and intent. Newer systems like RankBrain, BERT, and the Knowledge Graph interpret context, sentence structure, and the relationships between concepts directly, which is a different universe from matching a list of related words against a page.
The Kernel of Truth Inside the LSI Keywords Myth
None of this means the underlying instinct was useless. The reason “LSI keywords” persisted is that it pointed at something real, just under a wrong name. Covering a topic thoroughly, using the words and concepts a knowledgeable writer would naturally use, genuinely helps. Any ranking lift people credited to LSI was really just clearer, more complete topical coverage doing its job.
Picture a page about “apple.” If the surrounding text mentions orchards, varieties, and pie, a search engine can tell you mean the fruit. If it mentions iOS, the App Store, and battery life, it knows you mean the company. The related terms are not a magic ranking ingredient. They are the natural byproduct of actually explaining a subject, and they give search engines the context to understand which meaning you intend. That is the legitimate idea the myth borrowed and mislabeled.
So the honest reframing is this. Stop hunting for “LSI keywords” to sprinkle in. Start writing content complete enough that the related terms show up on their own because the topic demanded them.
What to Do Instead of Chasing LSI Keywords
The work that replaces the myth is straightforward and more durable, because it aligns with how search engines actually read pages today.
Write to fully answer the search intent. Before drafting, get clear on what the person typing the query actually wants. A page that resolves the main question and the obvious follow-ups will naturally contain the vocabulary of the topic, no generator required.
Build topical depth rather than keyword density. Instead of one thin page mentioning a term repeatedly, cover the subject and its neighbors well. If you sell roofing services, a strong page touches on materials, repair versus replacement, storm damage, and warranties, because a homeowner researching a roof cares about all of it. That breadth signals expertise far better than a sprinkled phrase list.
Use entities and clear language. Name the specific things your topic involves: places, products, processes, recognized terms. This helps search engines disambiguate your meaning the way the apple example showed, and it reads better for humans too.
Study the pages that already rank. The fastest way to spot genuine content gaps is to look at what the top results cover that you do not. That is real research, and it surfaces the related concepts that matter without pretending they are a secret ranking signal.
A few of these moves overlap with everything good SEO already asks for, which is the point. There was never a separate “LSI” task to add. There was only writing thoroughly and clearly, which the myth dressed up as something more exotic.
How to Find Genuinely Related Terms Without a Gimmick
If you want to discover the words and questions that surround your topic, Google hands them to you for free. You do not need a tool that promises LSI keywords.
- The People Also Ask box reveals the follow-up questions real searchers have about your topic
- Related searches at the bottom of the results page show adjacent phrasings and angles
- Autocomplete suggestions hint at how people actually word their queries
- The “searches related to” terms point toward subtopics worth covering
Pull a handful of these, see which ones genuinely belong in your content, and write about them because they help the reader, not because an algorithm is counting them. Standard keyword research already captures most of this, so for many businesses it is less a new task than a reminder to finish the topic properly.
The Bottom Line on LSI Keywords
LSI keywords are an SEO myth wrapped around a sensible idea. The technology is real but decades old, Google has said plainly it does not use it for ranking, and the term survives mainly because it gave marketers a name for “use related terms.” The practice that actually works is the one the myth borrowed from: cover your topic completely, write in natural language that names the real concepts involved, and answer the questions your audience is actually asking. Do that and the related vocabulary takes care of itself, while your pages earn relevance the way modern search engines genuinely measure it.If you would rather have content built on what search engines actually reward instead of recycled myths, Peak Marketing produces SEO content grounded in current best practices and real topical research. Reach out through our contact page to talk about a content strategy that holds up to how Google works today, not how it worked a decade ago.
