I cannot get a wi fi signal to my ipad today who can help with this?

bought an ipad 2 last week worked perfectly, today it says cannot find wi-fi connection, can someone check this out?

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��).