Good evening Neha and welcome to the Events Calendar forum!
Thank you for your interest in our products.
We’ll be glad to answer your questions.
Can we use it display different event categories
Absolutely! You can even assign different colours to the different categories.
different calendar?
Technically, you can only display 1 calendar per site.
But, especially when you use our the Events Calendar Pro premium add-on, you can control how you display the calendar via different links and shortcodes.
You can filter events based on categories, tags, start date, etc..
You can even control who can view what calendar or event based on roles and permissions: https://theeventscalendar.com/knowledgebase/admin-roles-and-permissions/
Can share same on facebook with friends
We do not have a built-in “Share with friends functionality.
But, since events are a custom post type, you can use the WordPress plugin of your choice to do that (as long is it supports custom post types).
As an alternative, you can customize any view to add that manually if you want.
You might want to read our Themer’s guide to get a sense of how that works.
Let me know if that helps.
Have a great day!
Geoff B.