Definition 6.1.1.
A collaborator for a GitHub repository has the ability to commit and sync changes to the project, as well as adjust certain settings of the repository. GitHub documentation provides some details on the different permissions/abilities that owners have in comparison to collaborators.
1
docs.github.com/en/account-and-profile/setting-up-and-managing-your-personal-account-on-github/managing-user-account-settings/permission-levels-for-a-personal-account-repository