If you have multiple calendars, especially those that were shared with you, your calendar can end up being a big mess, making it hard to visually find things. There are some solutions.
Turn off calendars from view
You may have some calendars that you don't need to view at all times. If the little box next to the calendar is colored, that means it is visible in your calendar. Click on that colored box to hide the calendar from view. The box will now be white, and the events on that calendar will not show in your calendar view. (To make them visible on your calendar again, click on the box again.)
The same event showing up multiple times
If you have one event that is on your calendar and also on the calendar of invited guests or rooms that you have showing on your calendar, you will see the event multiple times. Ex. the three boxes on the left side of the picture below.
There is a Chrome Extension, Event Merge, that can combine those events and make it a little easier to read (when you are in day or week view). Ex. the one striped box on the right side of the picture below. And I think the stripes are kind of fun! Click here to add the Extension, then refresh your calendar to see the results.