By default, in public repositories, any user can submit reviews that approve or request changes to a pull request. Organization owners and repository admins can limit who is able to give approving pull request reviews or request changes. For more information, see "[Managing pull request reviews in your organization](/organizations/managing-organization-settings/managing-pull-request-reviews-in-your-organization)" and "[Managing pull request reviews in your repository](/repositories/managing-your-repositorys-settings-and-features/managing-repository-settings/managing-pull-request-reviews-in-your-repository)."