GitIgnore

To do this, you will create a file in your current project named .gitignore. Git will use the .gitignore to determine which files and directories should not be tracked under version control. The .gitignore file is stored in your repository in order to share the ignore rules with any other users that interact with the repository.

Since the files to be ignored are dependent on the language you are using, the open source community has contributed some great templates for .gitignore files in the github/gitignore repository.