Today you’re going to learn about Latent Semantic Indexing (or LSI).
This is a phenomenal SEO strategy that you should be using in all of your SEO copy.
If you have any URLs out on your website that you want to rank higher in search engines, and they’re not quite there, you absolutely should be applying Latent Semantic Indexing principles to your copy.
We’re going to talk about exactly what Latent Semantic Indexing is, how LSI works, the fastest way to implement it on your own site, and how to get that going right away.
What is LSI?
Latent Semantic Indexing (LSI) is really just a fancy way to say “additional relevant keywords”.
The term is relatively new to the SEO world, but not as new in the academic world. In fact, Latent Semantic Indexing and Latent Semantic Analysis have been around since the late 1980s, dealing with natural language processing and distributional semantics. Basically, what they did back then was creating a matrix out of a large text and using a mathematical technique (singular value decomposition) to analyze the relationships between two documents and terms they contain. In 1988, Susan Dumais, George Furnas, Thomas Landauer, Karen Lochbaum, Richard Harshman, Lynn Streeter, and Scott Deerwester patented an information retrieval technique using this method.
The same basic principles apply in SEO Latent Semantic Indexing as well. Search engines use an information retrieval technique to analyze the terms in documents, and this helps them populate SERPs with the best options for users.
Google has a very difficult job in trying to rank documents. When a user does a search on a search engine, Google has to find the 10 most relevant documents to show on this first page of results for the given search terms, and LSI is really just a way to help them do that.
LSI is a super-important part of copywriting these days, specifically copywriting that’s beneficial for search engines.
The basic idea here is that there’s a number of keywords that do not necessarily fall into the synonymy category, but are incredibly contextually relevant to your primary keyword.
Before we dive into this, just a quick reminder: this is a component of Search Engine Optimization (SEO), and SEO is only one piece of digital marketing.
We’re going to be diving specifically into one SEO topic today (as mentioned above, LSI), but just keep in mind that your entire digital marketing strategy should be composed of much more than just Search Engine Optimization.