If you are a user of Google Calendar, one thing you can do is share your calendar with others and add other people’s calendar in yours. This can definitely be useful as you can see what your friends and family are doing (assuming they use Google Calendar). Additionally, there are lots of informational calendars Google offers, such as holidays, which are ideal to link to yours.

For a small businesses, if you do not have a vehicle to do this already, you could use Google Calendar to show conference room bookings, view vacation schedules, etc., etc. (be creative).

You can easily toggle different calendars being displayed by simply clicking them in a list so add as many as you like.