The keywords of your website are the foundation for every penny you will 
earn from day one. Get them right, and you will be amazed at the revenue they will produce. Get them wrong, and you will be working for nothing, on a site that cannot attract people that want to click ads or purchase products. The main thing to remember here is that it is not always your main keyword that will attract visitors, but also your LSI keywords.
LSI stands for Latent Semantic Indexing, and Google now puts a lot of faith in the fact that relevant content on a website should contain a good mix of LSI keywords, as well as main keywords. If the spiders see that you include keywords that are associated with your subject, and your main keyword for the page, then your page becomes higher ranked than a page that only optimizes for just one keyword – or the surrounding content is not as closely related. For example, if your blog is about knitting, and you have an article about nail guns, then the likelihood of the nail gun article outranking that of a nail gun blog is very slim – to none. The blog content surrounding the article will not be relevant, and who knows what the Adsense ads would look like.
There are various ways to ensure your LSI is right on the money, and Google itself can help here. When you search for a term, you can check the related terms at the bottom of the results, and you can also use Google’s Wonder Wheel to throw up valid suggestions that can be used around your article and page.
There is not yet a hard and fast rule for LSI, but everyone is sure that Google looks for it, and has said as much in press conferences. The rule of thumb now is to ensure you have it – and have it in spades.
Written by Andrew Fitzgerald - Make Money Blogging
