Search Engine indexing has always been considered a highly targeted science. Enter a search query into Google search and the pages that are displayed are generally optimized towards that exact word or term. However, in their continual battle to server the most relevant but most natural pages with genuinely useful information Google has injected latent semantic indexing (LSI) into its algorithms.

LSI is a unique indexing method that potentially takes Google search one step closer to becoming human in its way of thinking. If we were to manually search through web pages to find information related to a given search term we would be likely to generate our own results based on the theme of the site, rather than whether a word exists or doesn’t exist on the page.

LSI considers documents that have many words in common to be semantically close, and ones with few words in common to be semantically distant. This simple method correlates surprisingly well with how a human being, looking at content, might classify a document collection.

The introduction of LSI has seen some dramatic changes in the search engine result pages already.

Thanks to LSI and theme based search engines that use LSI, and the Webmasters who continue to focus on creating high quality, well written and engaging content, which "reads well" to a human being. The end result is higher rankings, better visibility and giving the user what they are looking for and more business the the web site owner.

When creating SEO copy use quality, relevant content and user friendly latent semantic indexing.