The G2 phase is a part of the cell cycle that occurs after DNA replication in the S phase and before the cell enters mitosis. During this phase, the cell continues to grow and produce proteins, ensuring it is ready for division. The G2 phase is crucial for checking DNA for errors and making necessary repairs. Cells typically spend a variable amount of time in the G2 phase, depending on the type of cell and its environment. This phase helps ensure that the cell is fully prepared for the M phase, where it divides into two daughter cells.