If you are using for The Events Calendar & Events Calendar PRO WordPress plugins by Modern Tribe, up until recently, if you wanted to to embed your calendar feed on other pages of your website, you needed install and use shortcodes in the Event Rocket plugin.
Now, Event Calendar PRO has built-in shortcodes to achieve the same result so the Event Rocket plugin is no longer supported.
Using the shortcodes you can just display a list of events from a particular category, the event calendar, the event countdown for a particular event and much more.
Previously you were restricted to their built-in Event List widget which could only be used in widgetized areas. I also had some trouble with this widget using category filters in different sidebars (it keeps removing the filters upon save).