What is a /home directory on linux, unix operating system

Home directory on a Unix or Linux operating system is root sub directory and a standard directory where the operating system stores user home directories under their own usernames

/home/username/
/home/john/

An individual's home directory is a space where one would store their personal items such as media files among others

Access permission is dependant on the name and type of distribution of the operating system
751 perhaps :|

How to go to your home directory

Among Linux distributions they are a vast number of way one can get back home.

On a standard Linux operating system directory path is stored in the $HOME variable

cd    --- works
cd ~ -- works
cd ~/ --- works
cd $HOME --- works