The acceleration due to gravity near the Earth's surface is approximately 9.81 meters per second squared (m/s²). This is often rounded to 9.8 m/s² or 10 m/s² for simplicity in calculations.

Here's what it means:

* Acceleration: It means that for every second an object falls, its downward velocity increases by 9.81 m/s.

* Due to gravity: This acceleration is caused by the force of gravity pulling the object towards the Earth's center.

* Near surface: This value is accurate for objects relatively close to the Earth's surface. As you move further away from the Earth, the gravitational force weakens, and the acceleration due to gravity decreases.

It's important to remember that this is an average value. The actual acceleration due to gravity can vary slightly depending on factors like:

* Latitude: Gravity is slightly weaker at the equator than at the poles.

* Altitude: As you go higher, gravity weakens.

* Local density of the Earth: Areas with denser rock formations can have slightly higher gravity.