Scripter from the Row Menu
This runs the Overall Script against the selected rows, the overall script can be written from scratch or we can add (multiple) scripts from the Scripts dropdown, these scripts are the ones we can create from here in Preferences.
So in this example we added two predefined scripts to the Overall Script, we added the scripts Add Album Disambuguation to Album Title and Set Classical Genre, and we can see that for the example data that the album field would be modified for Example 1 and the genre field would be modified for Example 2.