LSI Semantic Keywords | A Method for Higher Positions in Google

LSI Semantic Keywords

Are you looking for new methods that will allow you to improve the quality of articles on websites? Do you want to promote your domain more effectively? To do this, you need to master several foundations for content creation. One of them is LSI keywords, i.e. semantic keywords. What are they and how to use them in an SEO strategy? Check out our article!

Table of Contents

  • LSI semantic keywords – assumptions
  • LSI and SEO
  • What are semantic keywords?
  • Practical use of semantic keywords in SEO
  • How do you search for semantic keywords?
  • Content optimization with LSI
  • Summary

LSI semantic keywords – assumptions

LSI is the so-called “hidden semantic indexing”. It is a mathematical method developed in the late 1980s to improve the accuracy of information retrieval. It uses a technique called single-value decomposition to scan unstructured data in documents and identify relationships between the concepts they contain. It’s a specific approach that attempts to capture the basic structure of MEANINGS in a language.

Translating the less scientific nomenclature – there are hidden connections between words. LSI finds these connections, contexts, to better present information on a given topic.

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LSI actually allows Google to better understand the content, primarily synonyms and words contextually related to the topic. And if the search engine can understand the content, it can also index and organize it for its target queries. Furthermore, using synonyms can strengthen the thematic relevance of all content, and this must be good for SEO.

Google undoubtedly wants to understand the context of the content. The field of semantics (the study of meaning in language) is an essential part of this approach. With the help of key phrases, the search engine can determine what topic a given website is about.

Thanks to LSI, Google avoids the problem related to the homonymity of some words.

For example:

The word “saw” in the company of the words “Greater” and “station” is related to a different topic than in combination with the words “wood” and “properties”. Thanks to LSI, Google also creates hints in search engines, about which below.

What are semantic keywords?

Semantic keywords are any phrases that have a contextual connection with the main keyword. They are associated with it and help Google robots interpret the topic of content.

Another example. Let’s assume that you are creating an article for your blog and your main keyword is “dolphin.” The danger is that the dolphin is both a marine mammal and a swimming style. In this case, semantic keywords help Google know what concerns your content.

  • Dolphin – mammal (ocean, tongue, fish, etc.)
  • Dolphin – swimming style (butterfly, swimming, technique, etc.)

The constant transformation of Google algorithms is aimed at displaying the most relevant results to the recipients of the content query. Keep this in mind when creating content and optimizing it.

Practical use of semantic keywords in SEO

If you want to write a text about the installation of central heating, use many words that will have a similar meaning, e.g. diagram, connection. These expressions can also help in positioning. Despite the fact that they don’t have the same pronunciation, Google’s algorithms interpret the language and can understand the content. Therefore, if you want to create an interesting article about central heating, you can successfully use synonyms, without fear that it will ruin positioning activities. Also, don’t worry about the word change, as well as the long tail. See what the results for the phrase – “central heating installation” look like.

As you can see, the first positions are websites that have semantic keywords in the title or description – e.g. “central heating installations”, “central heating”, which have been additionally bolded. Similarly with the image search engine. Although the word “schematic” was not entered, the central heating projects were immediately found.

How do you search for semantic keywords?

The easiest way to find related keywords with a given phrase is to enter the phrase in the search engine and go down. Let’s stick to the phrase “central heating installation”. Google at the very bottom suggests phrases, given the history of user searches.

On the web, you’ll find lots of websites and tools to search for related keywords. You can even check how often they are searched per month!

Google Keyword Planner is a fundamental tool. It will provide key phrase suggestions related to the topic you are writing about. Unfortunately, this tool is only available if you have an active paid campaign in Google Ads.

To search for phrases, you should use the next two tools: Ubersugges’t and Answer the Public. I especially recommend the latter, because it creates interesting themed graphs and is the perfect software with which you will find inspiration for other blog articles.

Content optimization with LSI

If you want to effectively optimize content for SEO, regardless of whether on your blog or company website, you need to specify the key phrase for which you want to promote your site. Then use synonyms in:

  • Title – Meta title,
  • Website description – Meta description,
  • In headers (especially h1 and h2),
  • In the content (several times),
  • In the content as bold,
  • Graphics and photos in the alt tag,
  • In anchors of internal links.


LSI – semantic keywords – is nowadays an absolute necessity. By using synonymous and contextually related words, you are exhausting the topic. And Google rewards content that is detailed because the Mountain View giant is relevant. As you can see, proper preparation of key phrases as well as the entire content architecture is extremely important. And combining these elements with natural writing for the user is a challenge. Calmly. In most cases, if you create content on a website with the intention of exhausting the topic and make the text readable and natural for the user, LSI comes out by itself. 🙂

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