I can’t think of a good reason for a home network to broadcast its presence to the world at large. From a security standpoint, you can’t hack it if you don’t know it’s there.
The SSID is network name data your router 
transmits at an interval. Disabling the public broadcast of your wireless network is usually an option on your router ’s basic settings page, once you have configured the clients you wish to allow access. Changing the SSID from the default router name is just as critical. When you first purchase a new router such as a Linksys or Netgear, a default network name is set by the manufactures for the particular router . Changing this name to a unique SSID can help prevent even the savvy hacker who knows your network’s there from hacking into the default network name, even if the network is no longer broadcasting it.
Since every router is different I have listed below the basics steps on how to set up security on your router . This is just a simple guide on the key points you need to tweak. Since their are many router brands out there you will have to reference you routers manual for the exact details.