More precisely, tidal gravity is spacetime curvature.
What most people think of as "gravity"--for example, feeling weight when you are standing on the surface of the Earth--is actually non-gravitational forces, such as the Earth's surface pushing up on you, that are keeping you from freely falling. If you are in free fall, the "force of gravity" as people normally think of it disappears. (This was the key insight that started Einstein on the path to General Relativity.) What is left over is tidal gravity--freely falling objects converging or diverging because of the geometry of spacetime.
What most people think of as "gravity"--for example, feeling weight when you are standing on the surface of the Earth--is actually non-gravitational forces, such as the Earth's surface pushing up on you, that are keeping you from freely falling. If you are in free fall, the "force of gravity" as people normally think of it disappears. (This was the key insight that started Einstein on the path to General Relativity.) What is left over is tidal gravity--freely falling objects converging or diverging because of the geometry of spacetime.