Weeeellll, not that it doesn’t do anything, just nothing visible.
I’m pretty sure it makes note of the levels of posting that the claim has completed, or is ‘done with’. See the line of radio buttons to its left, ‘Now posting to’ Ins1, Ins2, Ins3, Patient.
It looks like a new mod on the old method of tracking claim posting. Used to be the progression was automatic from those ‘Ins’ → Patient but it was easy to get out of synch and post to the wrong level. Looks like you now can make note of the levels that have been completed so next time those will not be used.
If it ends up I’m wrong please correct me!