There are several ways of how you can add the calendar to the page.
For every single calendar, you can get a unique shortcode. Please see the Shortcode article to learn more.
Copy the shortcode, go to Pages, select page, or create a new one. On the Page editing screen paste your shortcode.
If you are using Elementor, follow to Elements tab and search for the BookIt Calendar. Add the element to the page.
Under the Content Tab open the Calendar Settings and select Category, Service, and Staff for the calendar.
You can add the calendar using the WPBakery Page Builder.
Open the page you'd like to use your calendar on. On the editing screen, click on WPBakery Page Builder.
Next, click on the Plus icon or the Add Element button to add a calendar.
Follow to the Content tab and find the BookIt Calendar element or use the search field to find it.
Click on the element to add to the page. In the popup specify category, service, and staff for the calendar. You can select the required option from the dropdown.