Italian Game is a chess opening with the ECO code C50. It goes 1. e4 e5 2. Nf3 Nc6 3. Bc4. White opens with 1. e4 (the king's pawn) and Black answers 1... e5. After 5 moves it is Black to move. The lesson on the board explains every move of the line and lets you play it yourself; it is free.
In chessGM's opening book this position continues with 3... Bc5, 3... Nf6, 3... Be7.
After 1.e4 e5 2.Nf3 Nc6, White plays 3.Bc4, aiming the bishop at the weak f7 pawn. It teaches quick development and fast castling.
chessGM has a full course for this line: open the Italian Game course lesson.