This is a small-ball SLOB designed to create a chain reaction of switches, ultimately freeing your best stretch-forward (#4) for a clean catch-and-shoot three. The continuous screening action forces the defense into delayed communication and mismatches.
This action is about pressure through continuity. The first screen tests the defense, the second one breaks it. Against switching teams, you’re not just running a play; you’re making the matchup you want and finishing over it.