Kirby is a content management system (CMS) that is highly versatile and adaptable to any project. It is popular among both developers and editors alike. The Starterkit, provided by Kirby, is a comprehensive installation package that includes example content, blueprints, templates, and more. It is particularly useful for new users to explore the various features of Kirby and become familiar with its panel interface. Kirby can be tried for free on a local machine or a test server before committing to a license purchase.