To understand how SEO or Search Engine Optimization works, you must first need to understand how search engines operate.
Search engines are Internet sites designed to help users locate information from other sites. Each search engine has its own way of locating information but all of them perform three basic tasks. First they search the Internet based on certain keywords or phrases. After which, they keep an index of what they find and where they found it. Then, when they have indexed sites that are in their listing, they would put them in a database so that it can be easily retrieved when a user requests a search.
Now that you know how a search engine operates, you will more or less have an idea what kind of work is involved in doing SEO.
SEO targets to raise a sites ranking in search engine results page (SERPS) and traffic volume by making it easier for search engines to find your site. There are several ways how to do this. The most common way is to improve site content. Since search engines are text-driven, the right placement of keywords relevant to a site makes it easier to be traced.
Other ways that SEOs could build up ranking and traffic is...