Some details: It combines near real-time images from multiple geostationary satellites, updated every 10 minutes (with a delay of ~30 minutes). NASA GOES satellite for the Americas, Japan's Himawari-8 for Asia and Meteosat in Europe/Africa. Zoomable up to 500m per pixel. Beyond that it uses historical imagery from Microsoft and Esri.
It also tracks the latest storms and hurricanes https://zoom.earth/storms/