Ardour pings back to ardour.org (which is hosted on AWS) to check if a new version is available, and inform you if that is the case.
You can disable it in various ways. You can pass either the -a or --no-announcements commandline option, change Ardour’s Preferences > General > New Version Check, or compile Ardour with --no-phone-home configuration option.
The request is anonymous, the only data shared is the current Ardour version and the operating system used.