SEO stands for the Search Engine Optimization that lays internet on the information goal for the users that uses it.
Everything we want needs to be done through search for it and in internet the pattern followed as usual. SEO is how to tackle the search engine in where we put our wish that we need to find out what information needed for a particular thing.
Search is performed and results are displayed as we take a look at the screen below
As we can see the Perfect SEO followed by this site so when relevant word are typed and searched you can see the results and they are organic used for SEO work.