Use SSH to make your local Home Assistant setup available at and through a remote system. This forms yet another way to make the Lovelace UI and other services accessible from other networks or the public internet.
This add-on is only useful to those with access to a publicly available SSH server and some administrative privileges on that system.
Read the full DOCS here.
Thread on the HA Community Forum: https://community.home-assistant.io/t/home-assistant-add-on-autossh-cloud-vpn-alternative/255444