Gravitation, also known as gravity, is a fundamental force of nature that exists between any two objects with mass. It is one of the four fundamental forces in the universe, along with electromagnetism, weak nuclear force, and strong nuclear force. Gravitation is responsible for the attractive force that objects with mass exert on each other, causing them to be drawn toward one another.

Key features of gravitation include:

1. Universal Attraction: Gravitation is a universal force, meaning it acts on all objects with mass, regardless of their size or distance from one another. Every object in the universe experiences gravitational attraction.

2. Proportional to Mass: The gravitational force between two objects is directly proportional to the product of their masses. That is, the larger the mass of the objects, the greater the gravitational force between them.

3. Inverse Square Law: Gravitational force follows an inverse square law, which means that as the distance between two objects increases, the gravitational force decreases in proportion to the square of the distance. This explains why the force of gravity becomes weaker as objects are farther apart.

4. Acceleration Due to Gravity: In the vicinity of a massive body, like the Earth, objects experience a constant acceleration due to gravity. On the surface of the Earth, this acceleration is denoted by 'g' and has an average value of approximately 9.8 meters per second squared (m/s²).