Microgravity : Gravity in terms of micro(millionth)
Microgravity can be also referred as much weaker gravity. In microgravity people or objects appear as a weightless. Even things can float in microgravity. Micro means very small.
Featured Image Credits to NASA.
Microgravity Introduction
Micro gravity is denoted by μg. 1.7 μg gravity is example of microgravity. In general, you may heard it as zero gravity. But zero gravity may lead to misunderstanding. Gravity is no zero in microgravity, but it is in terms of micro.

Where Microgravity can be found?
It can be found on Orbiting spacecraft. On the ISS also you can experience microgravity.