What is termux ?

Question

Please explain me.

Answer 1

"Termux is an Android terminal emulator and Linux environment app that works directly with no rooting or setup required."
If you aren't familiar with some of those terms search about them using a search engine you will get much more detailed info on the subject.

https://wiki.termux.com/wiki/Main_Page
https://simple.m.wikipedia.org/wiki/Linux

Answer 2

Fatam5931