SAFe
In plain terms
A framework for applying Agile at enterprise scale.
Going deeper
The Scaled Agile Framework coordinates many Agile teams across large organizations with structured roles, events, and planning. It scales Agile to the enterprise.
Under the hood
Adds layers (program, portfolio) and PI planning; criticized as heavy by Agile purists.
Examples
Enterprise Agile, multiple teams, PI planning, large organizations, ARTs.
Think of it like...
Like organizing many small bands into a coordinated orchestra with a shared score.