What is tpc.googlesyndication.com and why does it show up as referring URL traffic
This answer was provided by "DFPUser22" and copied from the old Google Analytics product forum.
tpc.googlesyndication.com has shown up in referral traffic but now it is starting to get hundreds of hits a day for the past 30 days. Ad Sense even is sending notifications that my ads are appearing on this site and I should authorize it. Anybody know what this is and should there be a concern?
What I know so far:
Full URL in source path: tpc.googlesyndication.com/