What is SEO and why SEO?

What is SEO?
According to wikipedia:
Search engine optimization (SEO) is the process of improving the visibility of a website or a web page in search engines via the natural or un-paid search results.

Why we need SEO?
You know maximum web user use search engine for their search. Sometime even if they know the web address. On the other hand if web traffic wants to search a site by key words then they must take the help of search engines. Though search engines contains the web sites data in their databases. So you should be keeping your concentrate on search engines. If search engines cannot contain your sites content on their databases or if you are not post your site on it then web traffic cannot found your sites. SEO keep an important rule to show your website or a web page in search engines result pages. A so called word is --- The search engines traffic can help you to achieve your success.

When you create a web site then you will expect that a lot of visitor come you site and day by day enhance the visitors. But how many visitors will come to write your site in their browser address bar 50-100, 100-200, and 200-300? It’s not wall to think that all of you visitors will come by writing your site in details. But it’s possible that majority of your web traffic comes from search engines.