Tidal acceleration is when the movement of the moon and the sun cause the tides in the ocean to move. This happens because the moon and the sun pull on the water in the oceans, causing it to rise and fall. This pulling also affects the rotation of the Earth.
Think of it like when you play tug-of-war with a friend. When you pull on the rope, your friend is pulled towards you. The same thing happens with the moon and the sun pulling on the Earth. This causes the Earth to slow down a little bit over time.
So, when the Earth rotates slower because of the moon and sun's pull, tides happen at different times in different places. This is because the moon and sun are in different positions in the sky, so they pull on the oceans in different ways.
Tidal acceleration can also cause the moon to move away from Earth over time. This is happening very slowly, so don't worry about the moon disappearing anytime soon! Overall, tidal acceleration is a natural process that helps create the tides we see at the beach and affects the rotation and movement of Earth and the moon.