Almost nothing. You really don't need to worry about it. If your computer works on the Internet, you should be fine.
WireGuard* is a state-of-the-art encryption technology that allows devices to communicate securely at near-wire speed. It is extremely secure and incredibly fast. You can learn more about WireGuard at wireguard.com.
The 2hO Network uses WireGuard at its core. WireGuard does all the heavy lifting. Then the 2hO Network software adds a self-adjusting management layer on top of that. The 2hO software makes WireGuard nimble and allows it to jump through hoops. The 2hO software looks after all the technical details so you can focus on other things.
Yes and no. VPNs usually connect you to one place. Like a fixed office. And traditional VPNs can be notoriously complicated and unreliable. The 2hO Network is like a totally transparent, always-on, often mobile, mesh VPN. You are securely connected to all the devices you need but without any of the hassles. It's like having a concierge look after your VPN connections.
* "WireGuard" and the "WireGuard" logo are registered trademarks of Jason A. Donenfeld.