Type of Feat: General
Specifics: A character with this feat is adept at a certain skill, gaining a +3 bonus on all checks with it.
Use: Automatic. This feat may be selected multiple times, but the effects do not stack. It applies to a different skill in each case.
See the skill bonus feats category to compare this feat, with its +3 bonus, against other feats. Several ones provide +4 in two skills, or a +2 bonus with an additional bonus for something else.
It is very useful for the concentration skill as an alternative to taking combat casting since it always provides a +3 bonus, while combat casting only gets rid of the -4 penalty for casting in combat.