When do you update the ad copy?

After 100 clicks, we compare the performances of two ads. We build a new ad to compete against the winning one for another 100 clicks.

How can we target competitors even more? / What is a Competitive Proactive Campaign?

It's possible to target competitors beyond the basic competitor campaign (which is where we show an ad after someone searches for a competitor). We can do this using affinity & intent audiences (which are audiences of people who are frequently associated with the competitor's business).