Questions about From's gambit, characterised by the moves 1. f4 e5, which constitutes a sharp response to Bird's opening.
From's gambit aims to take advantage of the kingside weaknesses caused by White with Bird's opening. Black follows up with gambiting the e- and d-pawns for the White f-pawn. Black has a bishop on d6, and has an attack.
Black may follow up with Ng8-f6-g4, intending to sacrifise on h2, to checkmate on g3. Another plan is to play g7-g5, forcing White to either weaken his kingside further, or to get his knight kicked away.
From's Gambit is usually considered to not be enough compensation for the pawn by opening theory.