What are LSI keywords?

LSI in easier terms is the keywords related to the main keyword. Let say we are writing about Messaging app, so personal message is main keyword where as voice message, text message, message background, message history. These all are related keywords and link to the same content as main keyword.
So, if we do search for personal messaging apps, the main keyword we targeting will show up, but if we do search voice message, chances are that same result can show up, not same rank, but at least show up.
These LSI keywords help in increasing ranking of a content, and break tie of search engines when the sites competing for a same main keyword.
So, technically LSI adds to ranking factor in addition to main keyword.

The full form of LSI is "Latent Semantic Indexing" keywords. Which means that similar or related keywords are similar to the main keyword. Using this, many search engines such as Google decide how to separate a user's search phrases from different web content. This makes it easier for Google to understand the content and find it according to the right search. This increases the search relevancy of your article. If you use LSI Keywords with Main Keywords then your article will become even more SEO friendly.

In Context of search engine optimization, LSI keywords or Key phrases are search phrases associated to the foremost key-word you are targeting. They assist to aid your content material and add extra context to make it less difficult for each customers and search engines to be aware of what your content material is about.

LSI Keyword is the main keyword. It can also be called related keywords. Latent Schematic Keywords refers to the keywords that the user searches on the search engine. This is necessary to correct On Page SEO. Search engines use it to make decisions. The search term he is searching for and what else could be related to that search? Its use increases Search Relevancy. Due to which the content becomes more SEO friendly.

Till a few years ago, the search algorithm used in the search engine used to find the exact search term only. Due to which it was a bit difficult to get accurate information. But, with the help of LSI Keyword, this problem does not happen. With this, Keyword Stuffing has been stopped to a great extent and only the right content is being ranked in the search engine.

For example, now if someone searches for Apple, then both apple fruit and mobile are likely to come. But if Mobile, Laptop, is added with Apple, then it becomes very easy for the search engine to know what the user is searching.

The full form of LSI is (Latent Semantic Indexing). Search engines like Google crawl through search engine bots before ranking the content of the page you have written. And find whether the keywords and content are matching or not. Apart from this, it checks the relationship by matching other phrases or sentences related to the content.

The phrase or sentence related to the keyword, which users normally use in the search engine, is called LSI Keyword. LSI also searches the phrase written in the title of the content within the content. It is also known from LSI that how many times a word has been repeated.

If you use only one phrase many times, that too unnaturally, then it is in a way against the search engine. The same search engine checks it by matching it with LSI. If you pay a little attention and also use LSI Phrase in Content Title and Heading, then this is the best method. LSI Phrases are meaningful and are also related to the content.