2048 is a popular single-player puzzle game where players slide numbered tiles on a 4x4 grid to combine them and create a tile with the number 2048. By merging matching numbers (e.g., two 2s make a 4, two 4s make an 8, etc.), the goal is to strategically plan moves to maximize tile values while avoiding gridlock. Simple yet addictive, it challenges players' spatial and strategic thinking.