It is information about the site can increase the 'usability' directory sites. As for the search engines, then in the search results people want answers to questions or, at least, part of the answer to the question. This is the result of the search will help you understand the person that the site has in search results on the search of the answer the question – is the resource on which the visitor will find the necessary information. This is the 'usability' of search engines. If the developers of search engines have long understood what information should be in the search results, administrators of most directory sites so far placed in its catalogs sites describing the firm. Search engines, giving answers to questions that are gaining increasing popularity, directories and websites that provide unnecessary information, on the contrary – are losing popularity due to lack of 'usability'. If the resource does not provide useful information, what's the point in a mediator? That's why the developers of search engines give comfort to provide information much more attention than anyone else. Draw some conclusions: 'usability' site – it is its convenience, including convenient reading and viewing information. Raising 'usability' – this is the first step to the top of search results. No need to go 'round and round' and give to your Online responses to the query 'color of the sky', if the site provides an answer to the question 'Why is the sky blue? ". Providing information on our site is on such an issue, you will have a much better chance to go to the first position results Search the site without any promotion, than go to the same results, giving information on 'blue sky' and typing in a couple dozen links to a page with this information.