The Agile Manifesto is a document that outlines the central values and principles of Agile software development. Officially referred to as the Manifesto for Agile Software Development, the guide aims to provide an effective model for teams to successfully adopt the philosophy of Agile project management and use it to improve their work process.
The lightweight framework of the Agile Manifesto was designed to improve upon existing software development processes, which were more complex and contained a lot of documentation. The founders wanted to speed up these processes and create a more efficient working model for teams.
Put simply, the Agile Manifesto is an alternative to traditional software development methodologies.