Wifi is an extension of LAN.
On a LAN, computers communicate via mac which is kept in some form of arp table.
In simple terms, if you have 8 PCs in your network, then expect to have 8 mac addresses in each and every PC, but mac address do get flashed now and again.
The most common attack vector used for mac address is cam address flooding but mostly targeted at switches to turn them into repeaters.
You can install wireshark and check the amount broadcast in your network