Commonly used in compound nouns like パーキングエリア (parking area) or パーキングメーター (parking meter). As a standalone noun, it refers to the act of parking or a parking facility.
Is there parking around here?
We took a break at a parking area on the expressway.
I parked my car in the parking area in front of the station.
I often use this coin-operated parking lot when traveling.
parking ticket; parking slip; parking voucher