Search Engine Optimization is the process of increasing the quality of website traffic by increasing the visibility of website to the users of web search engine. SEO is a methodology of strategies, techniques and tactics used to increase the traffic of visitors to a website by obtaining a high ranking placement in search engine result page. SEO is fast and dynamic field. It is more than building the links and modifying the keywords to improve the organic search ranking to increase the ranking of business. One needs to keep track of emerging trends such as voice search, Algorithmic Changes, your audience and technological changes.