For some reason, most of those who are trying to get to the top positions in search engines for any of the requests that, in the end are left with nothing. Either they fall on these requests, after a while, or users who come to them on a site does not do any good. That is the level of sales remains at zero. Here are a few main five reasons why it happens. One reason may be that the site is unwound by a common, highly competitive request. If you have a highly specialized site on the cars, the most unfortunate decision in this case will try to get on the first page of search "cars". Firstly, for this request is competing great number of other websites. And quite large, high-quality, inflated in terms of the number of links to their pages, etc.
Simply put, to compete with them, the same that cause fist fight. Secondly, query "cars" too general. Visitor, enter it, could be kept in mind anything. Therefore, this request is more appropriate to some large portals about cars, where you can find almost everything. And if you want to promote a highly specialized resource about car, then you should pick something more concrete. For example, if your site specializes in American wheelbarrows, it is best to use as the main Request "Cars from the United States."
Another reason might be that there is no relevant information on the site in response to a selected request. Relevant - means suitable. For example, if your company is engaged in writing a business plan to order.