Here's a breakdown:

* 9.8 Newtons per kilogram (N/kg) is the acceleration due to gravity on Earth's surface. This is a standard value used for calculations.

* Newton (N) is the unit of force. It's a measure of how strongly gravity pulls on an object.

* Kilogram (kg) is the unit of mass. It's a measure of the amount of matter in an object.

In simpler terms:

Imagine you drop a 1-kilogram object from your hand. Gravity will pull on that object, causing it to accelerate downwards. The strength of that pull is 9.8 Newtons.

Important Notes:

* The actual acceleration due to gravity varies slightly depending on location on Earth.

* This value is only relevant for objects near the Earth's surface. Further away from the Earth, the gravitational force is weaker.

Let me know if you have any other questions!