SEO or search engine optimization is the process of optimizing your website in search engines. The process helps to build your online identity and reputation to benefit your online business.
Seo is the process of optimizing the website to reach a better position in search engine. Seo focuses on rankings in organic search results. By Seo, business or a website can gain more popularity and visibility hence it improves the profits.
SEOs should understand the obvious reality (many don't) and work to make the site competitive against the sites that show up in the SERPs for relevant keywords.