What is the difference between IP address and default gateway?

I am trying to set my new router out and having problems automatically detecting IP. I manually enter the IP for the router into TCP/IP settings but what do I put in for default gateway settings? I know the numbers are similar but except for the last block of numbers. Anyone help?

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).