All world famous internet search engines have two major functions: crawling and building an index. they need to provide search users with a ranked list of the websites they have determined are the most relevant.
This sounds simple. 70%-80% of a website’s traffic begins with a search query. I wanted to write you about social networks, search query, followers and many tools and techniques for SEO but I saw one slideshow which will describe everything. Here you can read about all bad SEO practices and the best SEO practices today.

Rand Fishkin wrote slides about SEO: