adwords loss of traffic

for apparantly no reason

[tamarz]

one of my popular adgroups usually yields about 1000 clicks per day, with a CTR of 2%. Now yesterday something strange happenned, when for apparantly no reason - my traffic dropped sharply by 97% (!), and the click yield dropped to 30 clicks (CTR is still 2%)

when I search on google for keywords in this adgroup - i don't see my ad. I even raised my max bid - didn't help.
i judge the drop to be too sharp to be increased competition.
everything looks "normal" and "active" on the account.

could a small change in ad copy or target URL trigger such a huge loss of traffic, by my ad being under editorial review or for some other reason?

obviously something smells wrong. what could be the reason for loosing my traffic?

[Tropical Island]

could a small change in ad copy or target URL trigger such a huge loss of traffic, by my ad being under editorial review or for some other reason?

This is most probably the reason. Once you change something in the copy or url then you can be put "on hold" until it can be reviewed. This will especially apply to partner sites.

I think AWA advised in the past against making changes on a Friday because you could be off line for the weekend.