Quoted from Wikipedia
“Search engine optimization (SEO) is the process of improving the visibility of a web site or a web page in search engines via the “natural” or un-paid (“organic” or “algorithmic”) search results. Other forms of search engine marketing (SEM) target paid listings. In general, the earlier (or higher on the page), and more frequently a site appears in the search results list, the more visitors it will receive from the search engine. SEO may target different kinds of search, including image search, local search, video search and industry-specific vertical search engines. ”
Here you get all this under one root in your web application.
In order to get ample number of projects we need to adopt the Search Engine Optimization Strategy. This step is taken in order to get visible amongst uncountable search results. There are two types of it SEO unpaid(organic or algorithmic) and SEM paid ones. The earlier the web pages appear in the list the larger number of visitors it gets.