Topic Sensitive Page Rank

Another method involved in ranking web websites is called "Topic Sensitive PageRank" (TSPR). It's an enhancement to Google's PageRank.

Instead of ranking the pages solely based on all incoming links, TSPR gives weight to links that relate to the page's main subject area, like Teoma. Links from websites not directly related to the page's subject matter (topic), are assigned a lesser degree of weight in the calculation. A similar process is called "Hilltop."

There's much discussion about what method Google uses for website ranking. Topics include the use of TSPR and something called "block ranking," which basically groups internal links and uses that as a starting point for the original PageRank algorithm.