That stands for “Actually Smart Summon,” which is the new name for the automaker’s automated parking lot feature that kind of got lost in the shuffle. You press down on the button in the app, and the car will theoretically come to where you are in the parking lot. (The only videos I could find on YouTube so far take place at night in empty parking lots, which says a lot.) Hilariously, Tesla owners still assume full liability if their empty car runs over someone while being summoned. So summon at your own risk.