SSID broadcast is what lets people in the vicinity of a WiFi network know that it exists, by popping up as an available network on their devices. It can be a helpful way to let your guests and anyone near your business know that you offer WiFi access—but at the same time, that may not be a smart move. (Generally speaking, you don’t want to enable SSID broadcasting of your internal WiFi, for business security purposes.)
If you have a restaurant or another business where you want every customer to be able to access WiFi, you should probably enable SSID broadcasting. On the other hand, if you only want certain guests accessing your network, consider turning off SSID.
Your guest WiFi security is an important piece of your business’ overall customer experience. So it only makes sense to take these protective measures to keep it strong.