Glossary
Branch
An identical copy of a repository. Branches are great to test features before pushing them into the main branch.
.gitignore file
A file containing the name of all files, folders etc that should not be tracked. Lives in the root directory of your repo. Wildcards are allowed, for example *.png excludes all png files.
Issue
GitHub Issues allows you to create text-based descriptions of tasks, bugs, changes, and allow you to update your repository and document changes, It is also a way to communicate with other developers.
License.md
The license file in your repository tells everyone how they can interact with your content. Licenses can range from very conservative to very liberal (copy-left, open source). They are fundamental for the collaboration with others.
Origin repository
Your fork of a repository - the clone of the repository under your account.
Pull request (PR)
Pull requests tell others about the changes that you have made and pushed to a repository. Once the PR is opened, it is good practice to discuss and review the changes with other developers.
Readme.md
The Readme.md is usually the first file vistors see and interacts with on your repository. It should contain information about the purpose and content of the repository.
Upstream repository
The original repository that you have forked from.