Articles on: Chagiga Knowledgebase
How do I control how my page looks in search and when shared?
Open the page's Sharing & search settings. Set the Title in search and previews, a Description and a share picture. If you leave the picture empty it falls back to the site image, then the first picture on the page, then a generated card with your event name and date.
Where to find it:
Event > Website > Page settings > Sharing & search