Why is the moon getting bigger today?

The change of the moon's apparent size is mainly due to the distance between the points in its orbit around the earth and the earth. When it is closer to the earth at perigee, it looks bigger, and vice versa. According to the time point of observing the moon, the change of the size of the moon is mainly due to the rotation of the moon around the earth and the rotation of the earth around the sun. A month is a cycle, and the moon changes from new moon to full moon, and the diameter changes from small to large and then to small, so the size of the moon will change constantly.