What to expect from an informal interview?

I have an interview tomorrow and she said she wants to have a chat about the job with me, and it's more of an informal interview. What does that mean? Does it mean it's like any other job interviews?

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…).