script reference sub-objects

Unity Engine
1

hello everyone!, always when i search something for example-“rigidbodey” in unity’s script reference i see alot of sub-objects like:

Variables,

Messages,

Static Functions,

Static Variables,

Inherited members, ect…

can someone tell me Please what are those sub-objects and what do they mean?

2

If you want to know what something does, read the description.
If you want to know how to use it, then click on it.

Also, stop asking the same questions in multiple forums.