Wifi-hotspot

Yes. Your ISP (cellular carrier) sees all traffic. The owner of a public hotspot can see which sites you visit. If you need anonymity, use a VPN.

With the rise of the van-life movement, hotspots built into vehicles (or aftermarket OBD-II dongles) provide connectivity for navigation and entertainment on the road. wifi-hotspot

Standalone portable routers that connect to cellular towers to broadcast a dedicated Wi-Fi signal. How to Set Up a Personal Hotspot wifi-hotspot