We all know the tides from our own experience: ebb and flow alternate and ensure that the sea is sometimes very close, then again far away. A landscape that we call the Wadden Sea is created on a flat coast. Many children have heard that the ebb and flow of the tide are related to the action of the moon. You’re right!
It takes a little over 6 hours for the water to rise and the tide to come. Then the water falls again for 6 hours and the tide is approaching. The time from one ebb to the next is always the same: it is about 12 hours and 25 minutes. We know there are 24 hours in the day. This means that the occurrence of ebb and flow is shifted daily by a difference of 2 times 25 minutes per day (= 50 minutes).
What does the moon have to do with ebb and flow? Earth and moon orbit each other. That takes a little over 27 days. At the same time, the earth rotates around its own axis, which takes 24 hours. Since the moon is not very small compared to the earth, both move around a common center due to gravity. The gravitational pull of the moon acts on the side of the earth facing the moon. This “pulls” the water of the seas towards it and thus creates the tide.
It is not only the gravitational pull of the moon that acts, but also the centrifugal force. On the other side of the earth the gravitational pull of the moon is much weaker and this centrifugal force is at work. We remember the earth and moon orbiting each other (like two dancers holding hands and turning). On the side of the earth facing away from the moon, the centrifugal force is strongest and wants to repel the water of the seas. So there is also a flood there.
The flood and ebb areas move with the moon around the earth, the earth rotates under the flood and ebb areas.
source: https://en.wikipedia.org/wiki/Ebb_and_flow