The Discover page will open the world of Narrative to you. You will see high quality, featured and trending posts, and trending Niches from all over the Network. And the search is always there to help you find what you are looking.
If you are registered, the Home page will provide content from the Niches or People that you follow. Each Niche and User (People) have Follow buttons on their pages.
Here is a video to help you navigate the content streams.