Do you just leave it running all the time?
No. It depends on what I'm doing. Some things use a VPN 24/7. Some do not. I'm playing Overwatch at the moment and not using a VPN. I 100% always use a VPN on public WiFi.
Ok I was like “hold up” lol. I have a vpn I use from protonmail. Mainly use it for sketchy WiFi