Earlier this year, Google Calendar started automatically including a Hangout (video conference) link in every calendar event. This change has caused confusion for events that are held in person or utilize other conferencing options such as WebEx. For this reason, we will be disabling the automatic addition of Hangouts on Wednesday 7/16.
You will still be able to easily add Hangout links to calendar events by clicking the "Add a Google+ Hangout" link, but they will no longer automatically appear on every event. If you plan use Hangouts in any upcoming events, please review your calendar after this feature is disabled and add them where necessary.
Curious about Hangouts? Find out how to use them in our article Create and Use a Google Hangout.