Today i learned git and github for youtube on Kunal Kushwaha channel and that was filled with knowledge.I learned lot of stuff like git commit, git squash , rebase command etc and few things i figured out by myself. it took me 2 days to complete the tutorial although it was crisp and short tutorial of 1hr 30min approx.

What is git ?

Git is Version Control system. it is free and open source distribution.

what do you mean by version control system?

let us understand this with an example like you are making a program and you saved it using git at that point .and you continued to make changes in that program but later it got messed, so you can retrieve back the code at the point where u saved it by git. that's why it is called version control . you can control the pervious version of your program.