SEO stands for Search Engine Optimization, which refers to the process of optimizing a website or web page in order to increase its visibility and ranking in the search engine results pages (SERPs) of search engines like Google, Bing, and Yahoo.

The goal of SEO is to improve the quality and quantity of website traffic by increasing the visibility of a website or a web page in the organic search results. This is achieved by using various on-page and off-page SEO techniques, such as keyword research, content creation, link building, and technical optimization, among others.

In essence, SEO helps websites rank higher in search engine results, which leads to increased visibility, traffic, and ultimately, conversions and revenue.