The Referrers page shows how people are finding your content. Referrers are broken into five primary channels: Social, Search, Other, Internal, and Direct. Click on a channel to see a list of sites and apps sending traffic your way.
Social referrals come from Facebook, Twitter, Reddit, LinkedIn, Google Plus, Pinterest, and StumbleUpon. Twitter, Pinterest, and Reddit will show detailed referral information that can point back to individual tweets and pins, helping you identify influencers that are familiar with your content.
Search traffic comes from search engines such as Google, Yahoo!, and Bing.
Any additional external referral source will be classified here, including RSS feeds, external sites, applications, and more.
The Internal category includes any traffic from your site’s domain. This can be from the homepage, in-article links, or marketing automation emails (if properly set up with a matching subdomain). Often, large numbers of internal traffic on an article can be driven by photo galleries or paginated content where clicking to see the next image in a slideshow registers another page view, but it can also be a good indication of loyalty throughout a site.
Direct traffic simply has no referrer data. This could be because some typed a URL directly into a browser window. However, direct traffic may also come from “dark” sources, like email, SMS, chat apps, or a social network’s mobile app.