What is Assembly language? Where is it use?

Answer 1

Assembly can be translated directly (per instruction) into machine code that can be executed by the CPU. Unless you want to code directly with 0's and 1's, this is the lowest level type of language you will ever use.

An assembly language is specific to a type of CPU by the way, so there is not just one assembly language.

Answer 2

https://en.m.wikipedia.org/wiki/Assembly_language

Answer 3

Assembly is low level language
https://cs.stackexchange.com/questions/13287/why-do-we-need-assembly-language

https://www.quora.com/Why-is-Assembly-Language-used

You can download assembly app from store and learn more about it