Google Panda update causes many sites to decrease in their Page Ranking. Sites with poor and outdated copies have been affected with this recent Panda update. Although the Panda update helped a lot in clearing out spam sites from search engine ranks, many legitimate businesses and websites have been affected as well. Hence, Google stated the things they are looking for in a copy. Content is the most important factor of the Google Panda update. Evaluating your existing content should be your first move to determine whether your site will be affected or not. Grammar and usefulness of the content are the main factors that Google Panda checks.