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So if the threshold is meant to be .5%, why was this keyword with .7% disabled?
A clue came to me today when I disabled the weaker 3 of the 4 ads in the group, replacing them with new variant of the best ad, and found my disabled keyword was suddenly reactivated.
All I can guess is that CTR per keyword is measured for each ad in the group, and has to be above .5% for each ad, not just for average for all the ads in the group.
Has anyone else ran into this? Am I right?
It also applies to each keyword individually, as well as the total for all the groups and campaigns.
You should try using exact match if you are using phrase match and getting ads disabled.
if the last 1000 impressions of a keyword has under 0.5%, that keyword is disabled
if the whole campaign has under 0.5% for the last 1000, the whole campaign is disabled (so be careful that a few keywords do not disable the whole campaign when some are returning good ROI)