The gravitational force between the Moon and the Earth generates a tidal force that creates a bulge of water on the side of the Earth facing the Moon. This bulge also causes a tidal force on the Earth itself, which is stronger on the side facing the Moon and weaker on the opposite side. This is because the gravitational attraction between two massive objects decreases with distance. So, the side of the Earth facing the Moon is closer to the Moon and experiences a stronger gravitational pull than the far side of the Earth. This differential force generated by the Moon's gravitational pull causes the tides to rise and fall regularly.
