Question about using of github

I’m a github noob, so I faced some problem during my translation work, It can’t be committed through github GUI because something about authorisation. so I forked one clone under my own account, and post my translation into this branch.
So I wonder what should I do to merge my translation into the major one?
and, my branch named master, what does it means? should I change it?

I think you figured this out, but for anyone else reading: if you push your branch to GitHub, you can then go on GitHub and create a pull request. We’ll then be able to review and merge it in. (Also, make sure to sign the CLA.)

Thanks for help! I create a pull request successfully, but The travis CI build was failed, what does it means?