We are working on a use-case where in we need to get real time updates from Workday systems for the events occurring in Workday Systems.
I tried to understand the given documentation but I was not able to understand. I want to get the notifications at an http end point. Please help me get started with the notifications.
You can do this via Integration Subscriptions and the Notification web service.
Take a look at Workday's documentation on Workday's internal community on how to set this up. A good search phrase would be "Integration Subscription". Essentially, you can subscribe an integration to business processes, and then trigger the integration to kick off and send a notification to an external endpoint.
I've created a contributed solution on Workday Community with more detailed instructions: https://community.workday.com/node/571590