How to set up SFTP server on Debian 11.3

An SSH File Transfer Protocol (SFTP) server is an endpoint that is associated with a receiver or a destination during message exchange. The server can be associated with additionally than one destination or receiver, but a destination or receiver can be associated with only one server.
For more Explanation on this video https://www.linuxhelp.com/how-to-set-up-an-sftp-server-on-debian-11-3