| Lack of enough interest algorithm Remember, all search engines use secret proprietary methods to index & rank what's relevant. Not only does a site have to be found and indexed by the search engine, there are other factors such as the number of other links from other websites that point to a given web page, number of searches for a particular string or topic words, clicks to the site, etc. Some topics or keywords may not have enough of a 'relevance' to be indexed at all by some sites, and fall into different rankings between different search sites.
Remember when sites used to index EVERYTHING and you used to get 50,000 pages from a search and had to wade through all the links that didn't apply. The other side of the coin is that some sites may not be worth indexing if there is little to no activity or interest. There has to be a balance in order to make the search engine return good results you can actually use. |
