Android iap_acquire


Ok im using gms2 and this is for android app on Google Play. I am wanting to setup a single iap to simply remove ads.

This is from help section in gms2 for iap_acquire...

iap_acquire(purchase_id, payload);

purchase_id The product ID string for the purchase.

payload This is a string that can be used for purchase verification on Google Play (use an empty string, "", on all other platforms).

So my question is with the empty payload string. What actually goes the " " here for Google Play? Better yet if someone has a more clear way of setting up an iap to remove ads I would greatly appreciate it.