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Excerpt: Introduction The searches that bring up your web site are such that the distributions of queries is made up of a few common queries (hopefully your chosen keywords)  and many more so called long-tail searches.  Long-tail search queries are very specific queries that may only occur once however, the total number of these individual queries is such that they form the bulk of the total search. You will often hear about the 80/20 rule, i.e. 20% of the total number of search queries will be made up of the most common key phrases with the remaining 80% given to the long-tail. Modelling…