Search Engine Optimization is the biggest challenge for web business. If done with the right measures it can bring a site into max focus on search engine results page, leading to organic leads and sales prospects. SEO is the way to influence the web spiders to crawl the site, index it and rank it on SERP of Google, Bing and Yahoo. SEO is a long-term process which requires constant monitoring of the performance of site on SERP. The idea is to maintain the first order rank and never slip out from the first page.