Like a lot of people we put a tracking parameter into our ads.
Something like "campaign=GOOGLEUK"
Every now and then, when I check our referrals report, I'll see a referral that contains the string "campaign=WEB".
We have never used campaign=WEB so it looks like Google is doing this themselves.
Apart from throwing our PPC monitoring software out a bit (although it's easy enough to ignore campaign=WEB) what also happens is that the Google referrals changes from (for example):
...] (with campaign=WEB in the URL)
When clicking Google URLs from our referral report with the url? in it sends us to a "Redirect Notice" page whereas clicking the Google link from within our referrals report that has search? sends us directly to Google so that we can check how that search term fairs in the SERPs.
Any ideas? Why is Google adding the WEB to our campaign string automatically?