What Is SEO?
Search engine optimization (SEO) is the practice of getting targeted traffic to a website from a search engine’s organic rankings. Since organic search is one of the ways through which people discover content online, higher rankings can translate to higher organic traffic to a website.
SEO includes both technical and content practices aimed to align with the best search engine algorithm needs. Common tasks associated with SEO include creating high-quality content, optimizing content around specific keywords, and building backlinks.
In other words:
SEO is all about improving a site’s rankings in the organic (non-paid) section of the search results.
SEO is about improving a site's organic ranking
The main benefit of ranking for a specific keyword is that you can get “free” traffic to your site, month after month.