This logic group determines the current external IP of the own Internet connection and transmits it to the DuckDNS service.
The logic group itself consists of two http requests. The first http request determines the current external IP address and passes it on to the second http request.
The second http request is then triggered with a time delay and the determined IP address is transmitted to the DuckDNS service.
Duck DNS is a free service that points a DNS (subdomains of duckdns.org) to an IP of your choice.
Further information at https://www.duckdns.org/