In the world of search engine optimization, Google’s Pagerank calculation has assumed mythical qualities, but popular understanding lags behind what Google is really doing now. The search engine has changed how it calculates rankings. Whether you’re a developer/writer/SEO/Webmaster or marketer, an understanding of topic-sensitive Pagerank is essential to ensure your Web pages are considered relevant. If you’re looking for a good boost from links from other Web sites, you’d better understand the concept of “link reputation.”