I'm assuming it's NLP and parsing of the email body by Google.
My two questions are, is there a way to flag when this isn't working for a service? IE it doesn't work with popular train booking sites like omio.com
Secondly, if we are running our own business with calendar events, what would we need to do to make sure our own events are also parsed?
Increasingly I want to stop relying on google for essential services.