Search engine optimization, or SEO for short, is the practice of making a website rank better in search engines. Some common search engines are Google, Bing and DuckDuckGo. If you want to increase the number of people who find your website through search engines, then SEO might be something for you to start doing. There are other marketing channels that will drive traffic to your website. But on average, there is no digital marketing channel that will generate a lower cost per lead than SEO.