What is exactly meaning of commit command in git
commit is
A commit, or "revision", is an individual change to a file (or set of files). It's like when you save a file, except with Git, every time you save it creates a unique ID (a.k.a. the "SHA" or "hash") that allows you to keep record of what changes were made when and by who. Commits usually contain a commit message which is a brief description of what changes were made.
but i didn't got it
What is exactly meaning of commit in git and git hub?
NOTE:-This not dupli of any Q I am clear about git push
After you do changes in your code you will do "commit".
Commit set a message about the changes you were done. The commit also saves a revision of the code and you can revert the code to any version anytime in one click.
All time the perfect example for this is like a tree. Source tree for more precisely. This will be the perfect to explain the git branch on the source tree:
Every commit its a point on the "master", the master will be the tree trunk.
You can add a branch to the tree and add more commit only on this branch. After the changes, you can merge the change to the master.
So in summary, git is used as a code version manager. Knows how to deal with conflicts and combine several different versions into one version.
And this is screen capture of comparing two different code versions (commits)
Hope I helped you :)