Differences between Deep web and Dark web

Suface  web: It  can be  indexed  by  search engine like Google.

Deep  Web  &  Dark Web :They can’t  be  indexed  by search engine like Google.

Dark  web  is  a  small  portion  of  Deep  Web.

Deep   web (aka  hidden web) is  99% part  of  internet  you  can’t  Google,includeing  password-protected  emails , website that requires a password  to login   and  etc.

Dark  web which  you  want  to access  that needs  Tor  browser.