On the Analytics tab (left navigation), you can easily view the data for one or more of your podcasts.
If you have multiple shows, you will find checkboxes at the top of the page. You can select one or more of your podcasts and click the eye icon to refresh the data. This will display the combined information for the selected shows on both the Overview tiles and the graph.
Learn more about Podcast Stats here.
Learn more about Episode Stats here.
Learn more about Podder Analytics here.