There you are, building your site, and you come across a page where there's a noticeable space either before or after your main content in the First or Second Sidebar region.
What's going on here? And, more importantly; how do you fix it?
One of the powerful benefits of using a content management system like Drupal is the ability to reuse the blocks available in the service, but reusing your blocks can mean a couple different possibilities:
The featured people block is a system block (View) that will pull in information from an already-created Person page in your site. If you don't already have the profile completed, learn how to create a person page now. Note: you can create a person profile and hide it from your regular people directory using Additional Options (on the right side of your admin page) > Promotion options > Hide from Directory checkbox.
The RSS Feed block is a system block (View) that will pull in information from an external source of your choosing and display the RSS content within the block container in the page on which it has been placed.
The slideshow gallery block is a system block (View) that will pull in information from an already-created Gallery page in your site. If you don't already have a gallery, learn how to create a gallery page now.