Many SEO practicitioners are aware of and even utilize LSI when creating content for their websites. LSI is a matter of using related words which have similar meanings to the core keyword phrases one might be optimizing for on a particular page. By including these related words it can help search engines know more about what the page is about naturally as opposed to just stuffing the same key phrase over and over.
There’s a post on the Google Webmaster blog about this from Steve Baker that gives examples of some of the types of word relations that their algorithm can detect.
Here is list of some of those examples:
[song words], “lyrics” is bolded for “words”.
[what state has the highest murder rate], “homicide” is bolded for “murder”.
[himalayan kitten breeder], Google knows that “cat breeder” is the same as “kitten breeder”.
[dura ace track bb axle njs], Google knows that “bb” here means “bottom bracket”.
[software update on bb color id], “blackberry is bolded for “bb”.
[bb cream dark], Google knows here that bb means “blemish balm”.
[southeastern usa bb fitness & figure], “bodybuilding” is bolded for “bb.”
Another example was a query for ‘pictures’ that brought up a result with ‘photos’ in the title.
There has always been some debate as to the degree at which Google was using LSI but this article proves that it is in fact in use for many word combinations and therefore a good idea to make sure that any content you write includes these related words.
For more info you can check out the original article here:
http://googleblog.blogspot.com/2010/01/helping-computers-understand-language.html
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