Organic traffic is natural in the sense that it earns you more than you pay for it, but you still need to invest a lot of time and resources in SEO to be successful. Search engines have become better able to recognize the intent of search queries, which makes choosing the right keywords even more important for driving traffic.
Since organic traffic is not paid for, once the SEO strategy takes off and visibility increases, the site will begin to grow through this channel. More visibility = more traffic = more potential customers = more potential revenue. But it’s not ALL about getting website traffic. If it’s not quality traffic, it has no value. So never pay anyone who claims to get thousands of visitors to your site overnight!