UTM Parameters Source- Difference between Other and Paid

[ArchieH]

When researching a specific UTM campaign under Analytics Tools > Traffic Analytics > UTM Parameters, we are wondering what the difference is between "Other campaigns" and "Paid search". When we look at Customers from "Other Campaigns", it shows their First Seen Page as a Paid URL with the correct parameter so why is the Source showing it as "Other"?

Any help would be appreciated! 

[zacbowers · Accepted solution]

In our account, "Other campaigns" only appear as a source when adroll is involved. Do you have a tool like adroll participating in the campaign? If so, that could be what is causing that to appear.