What is Ping?
Ping is the oldest and simplest network diagnostic there is: send a small packet (ICMP echo request) to a host and measure how long it takes to come back. If it comes back, the host is reachable. How long it takes tells you about latency; how many packets go missing tells you about packet loss.
This online ping tool runs the test from our server rather than your own machine, which is useful when you want to check reachability from outside your local network, or when ICMP is blocked on your own connection.