For what purpose SEO is using?

The purpose of SEO aims to increase a business's organic search results, driving organic search traffic to the site. This enables data marketers to distinguish between traffic that comes to a website from other channels -- such as paid search, social media, referrals and direct -- and the organic search traffic.

In order to understand the purpose of SEO, it helps to understand how your site fits into the overall picture. SEO really is and why people who have websites need to care.