Search Engine Optimization is a process where a website tries to increase its visibility on the web. Seo has been around since the late 1990s and has undergone several changes since then. When this method was first invented, keyword stuffing was considered to be one of the best ways to increase SEO. Today, that process is considered outdated and irrelevant. Most companies rely on making user friendly URLS and building a great website. Google Panda, which made it debut in early 2011 has perhaps had the greatest effect on SEO. The purpose of the Panda update was to lower the search results for low quality content.