A communication apparatus transmits identification information for identifying a push message to be transmitted to the communication apparatus to a relay apparatus by using the first transmission unit, receives, from the relay apparatus, a push message transmitted by the relay apparatus after the first transmission unit transmits the identification information to the relay apparatus, and performs a process for switching the operation mode of the communication apparatus from the first operation mode to the second operation mode lower than the first operation mode in power consumption after the first transmission unit transmits the identification information to the relay apparatus.