What’s this xfinitywifi network and why do I keep connecting? (2016)

If you often tinker with your Wi-Fi network settings, no doubt you’ve seen the xfinitywifi network popping up as an available option. The xfinitywifi network is a huge Wi-Fi network created by Comcast using their own customer-rented routers as nodes on this network. Unfortunately, your device will keep trying to connect until you:

This can be a problem because the xfinitywifi network is not going to be as fast as your regular home network and because it’s isolated from your home network you won’t be able to access other devices such as printers.

Source: jimmymacsupport.com