Beacon spam refers to spamming beacon frames.
A beacon frame is simply a packet of information that an Access Point sends out, telling nearby devices the network exists
Using a deauther you can spam these beacon frames, effectively creating ghost networks. These ghost networks cannot be connected to, they do not exist.
Deauthers’ SSID list comes pre-loaded with the lyrics to the chorus of Never Gonna Give You Up - Rick Astley. However this can be changed.
SSID: network name WPA2: Protect the network with WPA2 Number: How many SSIDs of this type to add
ATTACK > BEACON, START
To modify the list of SSIDs to spam you will need to use the web interface
It is possible to mimic nearby networks instead of creating your own SSID names
Random mode can be used to fill the SSIDs list with random network names which cycle every 10 seconds by default