Why this one needs a probe
Your browser cannot send an ICMP packet. The sandbox gives JavaScript no raw sockets at all, so no amount of clever code will make a page ping something. Instead this sends your target to the free Globalping probe network, a real machine runs the real command, and you get its unedited output back.
When you’d reach for this
When a host feels slow or unreachable and you want to know whether it answers at all, and from where. Running the same ping from two continents is the quickest way to tell “the server is down” apart from “the path from here is bad.”
Learn the idea behind the tool
This tool is the fast answer; the lesson is the understanding. Start with The CLI toolkit.