SEO (Search Engine Optimization) refers to the optimization and marketing activities that enable the website work being done to improve website ranking and traffic across major search engines (Google, Bing, etc.)
Search engines rank the websites based on the relevant search phrases. The goal of SEO is to help clients achieve higher ranking in the major search engines.
There are many strategies that can be used to optimize a website for search engines. By combining elements of on-page optimization and off-page activities, search engines starts to index and rank your website on top.