A repository is a centralized location where data, files, or resources are stored and managed. It can be physical, like a filing cabinet, or digital, such as a cloud storage service. In software development, a repository often contains code, documentation, and other project-related materials, making it easier for teams to collaborate and track changes. In the context of version control systems like Git, a repository allows developers to maintain different versions of their code. This enables them to revert to previous states, manage updates, and collaborate efficiently. Popular platforms for hosting repositories include GitHub and GitLab.