We used to like best to see a fairly balanced mix, back when there were mostly just three sources: Organic, Direct, and Referral. Organic Search traffic is a good sign of general site health, it’s usually the top source of conversions, and it generally shows great ROI. Direct traffic is often the people who love your site or are coming back to buy after they found you in some other way. These two groups of visitors are probably the ones that bring you the most sales or leads.
Users land on this page without tracking code. They click on a link to a deeper page which does have tracking code. From GA’s perspective, the first hit of the session is the second page visited, meaning that the referrer appears as your own website (i.e. a self-referral). If your domain is on the referral exclusion list (as per default configuration), the session is bucketed as direct. This will happen even if the first URL is tagged with UTM campaign parameters.
The term “organic traffic” is used for referring to the visitors that land on your website as a result of unpaid (“organic”) search results. Organic traffic is the opposite of paid traffic, which defines the visits generated by paid ads. Visitors who are considered organic find your website after using a search engine like Google or Bing, so they are not “referred” by any other website.