The Albin Countergambit is an opening named after the chess player Adolf Albin. It is bold and aggressive. Therefore, the opening is favored by players who like to take the initiative and attack their opponent's position from the very beginning of the game.
The Albin Countergambit is a response to the Queen's Gambit, that starts with the moves 1. d4 d5 2. c4. In the Albin Countergambit, Black immediately challenges White's control of the center by playing the move 2...e5. This move attacks White's pawn on d4 and forces White to make an immediate decision.
One of the key ideas behind the Albin Countergambit is to create a pawn weakness in White's position. By attacking White's d-pawn, Black can create a weakness on the d-file, which can then be exploited by Black's pieces. For example, one of the traps that White needs to be aware of in the Albin Countergambit is the "Lasker Trap". This trap occurs when White plays 3. dxe5. We proceed with 3... d4, trying to crash into the position. After 4. e3 Bb4+ 5. Bd2 we have the move 5... dxe3, sacrificing the bishop for quick play. You can see this position on the board to the left.
To avoid falling into the Albin Trap, White can try other options, like defending the pawn with 3.e3, or taking the other pawn with 3.cxd5. Both of these options are also fruitless, and black can gain great play against them. If you are interested, the related video provides a more thorough analysis of these options.
In conclusion, the Albin Countergambit is a bold and aggressive opening that can be difficult to defend against. By attacking White's d-pawn and creating weaknesses in White's position, Black can take the initiative and put pressure on White from the very beginning of the game.