SEO is the process of improving the volume and quality of traffic to a website from search engines through natural or unpaid methods. The higher or earlier a site appears in search results, the more visitors it will get. To optimize a website for SEO, businesses should make the site easy to navigate, refresh content regularly, help search engines find the site, and make sure the site looks good on different browsers and devices. The goal is to make the website somewhere potential customers would want to explore and find what they're looking for.