However, I've recently had some success, using substantial negative keyword lists (3-500 keywords) and blocking MFA sites.
However, I'm at a loss for more ideas to optimize campaigns to improve CTR. Anyone care to share their suggestions?
As I understand it, ads are displayed on sites based on ad group themes, rather than individual keywords. That means you don't have keyword CTR to measure success against. Aside from endless ad copy rewrites, I'm short of ideas to improve CTR.