Your friends are actually right. SEO is vital in all kinds of businesses, especially online. In my opinion, digital marketing is the only type of marketing technique that still actual and works. Most people do not believe in TV adverts or newspapers. Digital marketing focuses on promoting an organization online, and there are several techniques that you can apply. I don’t want to go deep into details. If you read about GrooveFunnels, it will make things clear for you. Especially if you are a beginner and have no idea what SEO is. You can also check online, there should be some info, but as I know, it’s hard to find something.