When you make a query in a search engine, it combs through its vast database of web pages to deliver a search engine results page (SERP) with web pages ranked by relevance and popularity. The more relevant a result, the higher it ranks, the more people click on it … and the more traffic goes to that website.
Google and other search engines use mathematical formulas (algorithms) that take hundreds of variables (search signals) into account. The goal is to determine how well your web page answers a query (relevance). Then they rank your web page, in part, by how many websites are linking to you (popularity).
The vast majority of web traffic comes from just 3 search engines: Google, Bing, and Yahoo.
Increased traffic from major search engines can give you more exposure, customers, and revenue unlike anything else. That’s why investing in SEO can deliver an exceptional rate of return compared to other forms of marketing.