In other words when a web page is retrieved by the crawler the contents of the page are examined. All the links that are identified on that page are retrieved and placed into the queue of links waiting for the crawler to go out and search that particular page. Each link has a priority queue associated with it. This priority level informs the crawler how important, or relevant, this particular page is to the chosen topic. When the web crawler must decide which link it should follow next, it will pick the one with the highest priority.
Topic appears more than once in the page.
Any link that originates from a hot page will be examined to identify if the topic appears within the link. The priority of outgoing links will be raised based on the heat value of the originating page and the outgoing link. By raising the priority of relevant links the crawler is able to focus it's search by crawling what it thought were the most relevant pages first. The remaining links are not discarded they are just traveled last.