Recently Google published a couple of new tools to use in helping find keywords and to find keywords which relate to each other in googles eyes. The more you can incorporate the results into your web site the more trust google will afford you.
Let’s first take a look at the Google Wonder Wheel. It is one of the most amazing tools I have seen that are free. If you were to ask SEO experts about LSI (Latent Semantic Indexing) you could easily create a riot of the greatest magnitude. It’s split about 50/50 whether this is real and google uses it to rank pages or that it is a myth and of no use. With the two tools released by Google recently this case is closed. As google uses LSI in both tools, and actually shows you what it wants.
First is the Google Wonder Wheel Check it out! Go ahead and type the most important keyword or long tail keyword into the wheel. Voila! Google shows you the keywords that it feels are best associated with they phrase or word you type. Want to dig deeper? click on any of the words that are in the spokes and a whole new bunch of keywords shows up. Now you have some serious insight into how google thinks your site should look like. If you are missing some of these words or phrases then edit your web site and make the changes to reflect exactly what google wants. Watch your ranking shoot up!
The other tool from Google is the sktool. http://www.google.com/sktool This one settles the debate. While there is a preponderance of evidence that LSI is not used by Google because it does not scale well, there is also a huge amount of evidence that google uses at least something similar to map relationships between keywords.
There is also a sense that sites with internal structured LSI and how they link to within and without the site somehow turbo charges the search engine rankings. Try out this tool and see if it quickly pays off for you in better and higher rankings for those keywords your site uses.