I want to change my wifi dns for a new server on a game. Will doing this affect my wifi, and can I change it back again?yes, you can always change it back at any time.


just checking.... do you mean DNS or IP address?
and what is it you are trying to achieve?


your DNS address is your 'gateway' to the internet (often called your gateway address) so changing it will effect things but it depends on what it is being changed to and why.
think of it as, IP addresses are for LAN's (from the modem looking inwards at your PC's) and DNS's are for WAN's (from the modem looking outwards to the world).Hebe is a link to a sue taut MAY be helpful.

Best DNS Servers (Free and Public)

He claims these free services might be better that what the provider gives you.You can check it out.
Quote

Depending upon distance between your place and DNS server, there will be speed improvements
If your ISPs DNS servers are not that reliable, using an alternate DNS server will improve stability
If you are using an old Operating System with no security updates, using a third-party DNS will be protection from PHISHING attacks
And, yes, you can get rid of geography-based CONTENT restrictions and web censorship