Search engine optimization is classified into on-page and off-page. On-Page SEO: The technique that perform during the development of the web site to get high rank. In this category the developers use different keywords in different tags of the HTML code like Title tag, Header tag, Alt tag, Meta tag, Body tag, anchor text and URL. Off-page SEO: The technique that is used to make a web site popular on the internet after lunching it. Off-Page SEO improves website ranking easily on SERP. Off-Page SEO mostly depends upon social media activity. Bookmarking and link building are also used to improve web site visibility on SERP.