Comment by PeterStuer

A system by wich you can expose things on your private network (e.g. your home lan) so you can selectively and securely make them accesible from other places (e.g. over the Internet). You can do all this without tailscale by just configuring secure encrypted tunnels (wireshark, traefic, ...) yourself, but services like tailscale provide you with easy gui configuration for that.

I personally use Pangolin, which is similar https://github.com/fosrl/pangolin