Agile is a focused approach for software delivery that builds incrementally from the beginning of a project, as opposed to trying to deliver it at all at one time at the end of a project. Agile works through a set of practices and attitudes that focuses on the following principles:

• Individuals and interactions over processes and tools
• Working software over comprehensive documentation
• Customer collaboration over contract negotiation
• Responding to change over following a plan

By breaking down a project proportionally and by prioritization, aspects of the project are delivered in cycles called iterations, and can help to ensure the success of your project.