Before a top level deployment can be made, a version group of each web app needs to be compiled on the web app deployments instance.
Compiling a version group freezes the version group, thereby preventing content edits.
Extra: Compiling one version group un-compiles any other compiled version group of the same web app.
about
Web App:
Version Group:
... staged version/s from ... employee/s
This version group has not yet been compiled.
This version group has been compiled with .