If you've entered your event's venue address but the pin on Google Map isn't showing an accurate location, don't worry, it's a quick fix.
First click the Details tab on your Event dashboard
Click the link that reads Address correct but the map is wrong?
A new screen will pop up with a map. Click and drag to drop the pin in its appropriate location, or simply click directly where you'd like the pin to be. Once the pin is in the correct place, click Save Changes and all the maps associated with your event will reflect the new location.
Please note, your event page will only show one location. If your event has multiple venues/locations it is best to choose one venue/location as your starting point and in the About section of your event page, make your event goers aware of the other venues.