Understanding how people landed on your website is a key component of optimization. If you’ve ever looked at Google Analytics (and if you haven’t you should), you’ve probably seen the words “Direct,” “Referral,” and “Organic” in relation to your traffic. These are the sources where your users come from — or what Google calls channels. But what do these words really mean, and why do they matter?
Cheers for sharing that thread, I'd not read it. I think most of the confusion here arises because of how standard GA reports work on a last non-direct click basis - if there's a previous campaign within timeout, that user will be attributed to that campaign, even if they're technically returning via direct. MCF reports are the exception, of course, given that they show *actual* direct.
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.

Hey Julia, thanks so much for the comment. I just saw the idea you were talking about, that is awesome. I think you are right cause although it seems a bit inconvenient, I personally wrote down a few URL like that in my cell phone or notebook to check it out when I am back at the computer. Wow, this is something I need to think about. Also, how about those big billboards?
Direct traffic is defined as visits with no referring website. When a visitor follows a link from one website to another, the site of origin is considered the referrer. These sites can be search engines, social media, blogs, or other websites that have links to other websites. Direct traffic categorizes visits that do not come from a referring URL.