For example, CTR may not
always be the best performance metric to track. "I previously didn't track things down to the level of ad copy (at least not for all my campaigns)," he says. "I began doing that and discovered that
out of my 2 active ads on one campaign, one had a CTR that was about 0.2% lower than the best one, but had nearly double the conversions on many less clicks."
Also, analyzing the
competition is key. "If you see an ad appearing everywhere, examine it," he says. "Pick it apart. Pick apart the motivations, the banner, the offer, and where it's showing. Think, 'why is it showing
so much here?'"
Lastly, understand that sometimes, campaigns just wear out their usefulness. After two months, a highly successful ad may just stop converting so well--no matter how you try to tweak the ad copy, placement or other factors. Take the best-performing parts of it (be it the title, the keywords, or the content it was running against) and apply it to a new campaign.