In the Jerome Gambit, White's "extra" pawns can be part of the attack, or part of a fortress of protection. In the following game, they take both roles, as part of the first player's success.
Queenpunisher - parviz1340
12 8, lichess.org, 2016
1.e4 e5 2.Nf3 Nc6 3.Nc3 Bc5 4.Bc4 h6 5.Bxf7+
Transposing to the Semi-Italian Jerome Gambit.
The same position would be reached after 1.e4 e5 2.Nf3 Nc6 3.Bc4 h6 4.Nc3 Bc5 5.Bxf7+ Kxf7.
6.Nxe5+ Nxe5 7.Qh5+ Ng6 8.Qxc5 d6 9.Qh5 Nf6 10.Qf3 Bg4
Black has the right idea: his team of minor pieces should harass the White Queen, even if his own King is not yet castled-by-hand. Perhaps Queenpunisher's Queen should have been harassed by 10...Nh4!? instead.
The text is a little bit better than 11.Qe3 Re8 12.d3 d5 13.f3 d4 14.Qf2 Bxf3 15.Qxf3 dxc3 16.bxc3 c6 17.O-O Kg8 18.Be3 Qd6 19.Rab1 b6 20.Bd4 Qd7 21.Bxf6 Rf8 22.Qg3 gxf6 23.Qxg6+ Qg7 24.Qf5 Qg5 25.Qe6+ Kh8 26.Qxc6 Rac8 27.Qd6 Rcd8 28.Qf4 Qxf4 29.Rxf4 Rg8 Black resigned, MIG - leshiy, FICS, 2001.
Or 12.f3 Bd7 13.d4 Nh5 14.Qf2 Kg8 15.Be3 b6 16.f4 Rf8 17.f5 Ne7 18.g4 Nf6 19.g5 Nxe4 20.Nxe4 Bc6 21.f6 Ng6 22.Qf5 Qe8 23.d5 Bd7 24.Qf3 hxg5 25.Bxg5 Qe5 26.O-O-O Qe8 27.Rde1 Ne5 28.Qg3 Qg6 29.fxg7 Kxg7 30.Rhg1 Qf5 31.Bh6+ Black resigned, youjoin - molesto, GameKnot.com, 2007.
12...Qd7 13.f3 Be6 14.O-O Nh5 15.Qf2 Kg8
For now the "Jerome pawns" provide a shield for White, but that will soon change!
16.Ne2 Rf8 17.b3 Rf7 18.f4 Bg4
This second visit to g4 is ill-advised and will cost a piece. Better 18...Raf8.
19.f5 Bxe2 20.Qxe2 Ne5 21Qxh5 Raf8 22.Bb2 Qc6
White now has attacking prospects.
23.Rf2 Kh7 24.Raf1 Qb6 25.Kh1 Nd7 26.Qg6+
He also could have tried the consistent 26.g4.
26...Kh8 27.Qxh6+ Kg8 28.Qg5 Ne5 29.Rf4
White attacks successfully. He also could have tried the thematic 29.f6.
29...c5 30.Rh4 Rf6 31.Bxe5 dxe5 32.Rg4 Rg6 33.Qxg6 Black resigned