Referral traffic refers to the flow of visitors who arrive at a website via external links - i.e. via recommendations from other sites (the Referrer). These references can be found in the Website Analytics clearly differentiated from direct or organic traffic.
Typical sources of referral traffic are blogs, forums, press articles or partner sites. It can be precisely analysed using tools such as Trackboxx, Google Analytics or Matomo and provides valuable information on cooperation potential or viral content.