SEO is short name of Search Engine Optimization. SEO can be a team, organization, group or any people who try to generate more traffic from search engine to website.
Why SEO is very important?
Almost 80% people surfing on the Internet to use search engine to collect information. 80% of them will click the website links on the search engine first page, 15% on the second page, 5% on the next pages.
Base on google webmaster tools, 40% above traffic is come from search engine. some website even can get 80% of search engine traffic.
A website with great SEO help people easy find the website, and the sales and reputation is increasing at the same time.
You can image that, a website without good SEO, means will lose 40% of the traffic on search engine,that means 40% of sales will gone.