You can use labels to organize issues and pull requests in a repository into categories based on priority, category, or any other information you find useful.
Tip: You can also create a label in the Labels drop-down menu within an issue or pull request.
On GitHub, navigate to the main page of the repository.
Under your repository name, click Issues or Pull requests.
Above the list of issues or pull requests, click Labels.
To the right of the search field, click New label.
In the text box, type your new label name.
Type a description to help others understand and use your label.
A color is automatically selected for the label. You can customize this color by editing the hexadecimal number or clicking the refresh button for another random selection.
To save the new label, click Create label.