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How to chose keywords
Pay-per-click: Google AdWords account structure
Pay-per-click: Yahoo Search Marketing (SM)
Domain names
Content
spidering
CIRCA technology: applied semantics to search engines
Latent semantic indexing (LSI)
Google's ranking algorithm
part 1/4
Google's ranking algorithm
part 2/4
Google's ranking algorithm
part 3/4
Google's ranking algorithm
part 4/4
Google's
original
patent:
how Google
works
Google's sandbox: delayed inclusion of new websites
Google's penalties: getting penalized
search engines
How search engines evaluate relevancy when ranking search results
How to be informed when a search engine spider visits your site
How to instruct
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duplicate content
Australian search engines list
World major search engine list
Web searchers' behaviour: shocking web users' statistics
Listing expectations: how much better is ranking No. 1 versus No. 10?
web marketing
Seven reasons
why customers
don't buy
12 ways to exceed your client's expectations every time!
Market reseach for new online business
How to set up your best customer profile
12 tips to build
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How to market your website: five keys to web site marketing success
How to market your website: the five web marketing laws
How to market your website: miscellaneous marketing strategies
How to market your website: a mixed marketing media approach
miscellaneous
Are you cross-browser compatible? Learn how to do it
Javascript to let visitors bookmark your website
Why your web pages don't load fast enough
Javascript to open a link in a new window

Google is likely to give more weight to latent semantic indexing (LSI) in its ranking algorithm.
What is latent semantic indexing?
LSI means that a search engine tries to associate certain terms with concepts when indexing web pages. For example, Paris and Hilton are associated with a woman instead of a city and a hotel, Tiger and Woods are associated with golf.
Google has been using this concept to determine suitable ads for its AdSense service for some time now. It seems that Google is now also using this concept to improve the quality of its search results.
If you search for a keyword on Google and add a tilde ~ before the search term, then you get an idea of what Google thinks about a search term.
For example, if you do a semantic search for phone, Google returns Nokia as the first result. A normal search for phone returns different results. Adding a tilde to the search term seems to instruct Google to do a semantic search.
Why is this important to your SEO activities?
If Google uses this concept in its ranking algorithm (which is very likely) then its advisable that you don't focus on a single keyword, but on a set of related keywords with your search engine optimization activities.
You should optimize some of the pages on your web site for keywords that are synonymous with the keyword you're targeting.
When you exchange links with other web sites, make sure that you vary the link text to your web site so that it contains different variations and synonyms of your keyword.
Where can I find further information about LSI?
If you're interested in the theories behind this concept, the following pages can give you detailed information:
Latent semantic indexing helps search engines to find out what a web page is all about. It basically means to you that you shouldn't focus on a single keyword when optimizing your web pages and when getting links.
The web pages on your web site should be related and focus mainly on a special topic while using different words that describe the topic. Use variations of your keyword and synonyms. That makes it easier for search engines to determine the topic of your site.
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