What is**

Answer 1

(**) is an operator:

X**Y

It multiply the number X for Y times the same number X.

Answer 2

Exploitation. Meaning power of like
2 **5 = 32 means 2 raised to the power 5 or 2 × 2 × 2 ×2 ×2

Answer 3

It is also called unpacking operator for dictionaries.
https://realpython.com/JUMP_LINK__&&__python__&&__JUMP_LINK-kwargs-and-args/

Answer 4

** is called the exponentiation operator. Python gives you this wonderful feature. It is actually like writing x**y where x is multiplied by itself y times. for example: 5**3=125. that means 5*5*5=125. Hope you understood.

Answer 5

Power
3**2 = 9