How can Yahoo! improve it’s search results? Google nailed it down for about a decade by using their so called PageRank algorithm. But because it’s a patented technology, others can’t copy it. However, it’s not just the pagerank that really improved the search results. One other key thing with Google’s approach is to give more importance to the text used to describe the target page by the link text/anchor. This is quite powerful, because, someone who provides ERP application performance tuning services can use a bunch of keywords on every page of the website whether or not that page really is about that topic. But sites that link to any of those pages, will use only a handful of keywords to create the appropriate description for the page.
The very concept of identifying what a page is about from an external reference to the page using a particular description is similar to deriving what a page is about based on the tags used to book mark that page on del.icio.us. So, instead of purely relying on the keywords listed on a page, while crawling and indexing a webpage, Yahoo! can query up the tags associated to that page in del.icio.us repository and combine it to provide extra weight to the keywords used in the tags. One good thing with this approach is, the tag cloud of the page on delicious gives information about what people generally think of that page as. For example, even though tocloud.com provides tag cloud generation tools, when someone sees that page, they think of various other things such as tagcloud, tagging, seo etc. But more weight to tagcloud than to seo because the del.icio.us tag cloud for tocloud.com shows tagcloud tag much bolder than seo tag.
Ofcourse, just like Google has to deal with issues such as link farms, backlinks etc, people may start creating fake accounts and keep tagging their pages with all sorts of keywords to influence the search results. So, there should be some clever algorithms by Yahoo in detecting fake users vs real users who are tagging and filter out any such manipulations.
Now what will live.com do to figure out the true purpose of a website? Those who finds an answer can start the 3rd search engine that can be quite successful.