From the link you shared your friends can see your race route and leave messages on the map. When you reach these points in your route, your phone will speak the messages to you! The page also has a countdown to the start of the race: when the race is on friends can send you LIVE messages, which you’ll hear immediately.
Practically all languages are supported, so your friends can leave messages in any language they want to!
No one – not even you – can read these messages, so no need to be shy with them. One message takes a few seconds, but the race is long – so tell your friends to leave lots of funny messages to keep you going through the race!