What Are LSI Keywords (Latent Semantic Indexing)?
In the past, Google's algorithm was very simple: the more a keyword appeared on a page, the higher that page ranked. This led to the creation of spammy, unreadable articles—a practice known as "Keyword Stuffing" that ruins the user experience.
With the Hummingbird and BERT updates, Google became much smarter. It no longer counts words; it understands the context. This is where LSI (Latent Semantic Indexing) comes into play. LSI keywords are secondary terms directly related to your main topic. Using these words signals to Google, "I am covering this topic in deep, authoritative detail."
An LSI Example
If your article is about "Apple", how does Google know if you mean the fruit or the tech company? Through LSI keywords! If the text includes "iPhone, Mac, Steve Jobs, Screen", it identifies the company. If it includes "Tree, Vitamin, Red, Orchard", it understands you mean the fruit.
Long-Tail Traffic
LSI terms often contain long-tail keywords consisting of 3-4 words. These phrases have low competition but extremely high buyer/reader intent. By utilizing LSI, you can drive massive traffic from hundreds of small, specific searches with a single article.