Put simply, it is a set of techniques that will get your website to the first page of Google.
How does it benefit your business? Imagine that your business is located in an isolated neighborhood. You will have no possibilities to get customers or build relationships with potential business partners. Well, that’s pretty much how the second page of Google on forth look like. For that reason, you want to optimize your website for SEO so you get to the first page (The neighborhood with quality traffic)