A: Not really.
Follow Friday, #FollowFriday, or #FF isn't essential at all.
It is useful if you are looking for new friends with similar interests. Mostly, it is overused by those just looking to bump up their followers.
Be picky in who you follow and choose to follow back. It's about the quality of tweets, not the quantity of followers.
Forget the numbers, and just enjoy the camaraderie.
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