What does auto cool mean in the operation of an air conditioner?

When turning on the air conditioner, you have the option to choose auto cool. What is this function for since there's the thermostat regulates the on/off of the compressor?

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��).