What happens to the bytes that take up space after they are deleted in a recycle bin to create new space?

I am wondering what computers do to memory, or bytes, that creates new space after something is deleted in a recycle bin. Any clue?

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…).