Google AdWords doesn’t allow bidding on certain words and phrase, except if an exception is requested and granted. Guess which word was disallowed among the following:
Fentanyl, improvised explosive device, IED, car bomb, jihad, rifle, RPG-7?
Rifle was disallowed, even in the phrase national rifle association! All other keywords above were allowed and approved.
See the screenshots in Google-Adwords-rifle-vs-fentany.pdf