If you do not enter a complete street address when you are creating your event, a map will not display on the invitation when you send it to your guests.
If you would like to create a virtual event you can do so by navigating to the Where page, then entering a URL (such as a Zoom or Google Hangouts link) in the Venue Name or Link field or in the Street Address or Link field.
NOTE: The City, State, and Zip fields are never required so it's fine to leave them blank when you are hosting a virtual event.