The Galleria theme comes with a whopping 17 unique sections that you can add to your home page.  You can add them more than once if needed, and in any order you want on the home page!  Here's a brief rundown of what they're called and what they do:

• Blog posts - shows a grid of 2, 3, or 4 of your most recent blog posts with featured images
• Collection list - shows a grid of collections along with collection featured images
• Featured collection - shows a grid of products from a collection you specify in theme settings
• Columns slider - allows you to add a unique multi-column slideshow (learn more)
• Gallery - a very flexible section allowing you to create a dynamic grid of images with an option to add text and links to them (learn more)
• Hero image - shows a large full-width image with optional text and a button
• Logo list - displays a rotating carousel of logos that you upload with optional links
• Slideshow - allows you to add either a traditional rotating slideshow (learn more)
• Featured product - displays a single product that you specify and allows the customer to choose options and add to cart right from the home page
• Instagram feed - shows recent images in a grid from an Instagram feed you specify
• Twitter feed - displays a rotating carousel of recent Tweets from a Twitter feed you specify
• Map - displays a Google map of a location you specify and allows you to add text for your address or anything else you want
• Page - allows you to display the content of any page you have created on the home page
• Rich text - displays a heading and sub text with an optional image behind or next to the text
• Testimonials - displays a rotating carousel of testimonials that you input in settings along with the authors
• Video - displays either a full width video that autoplays when you arrive on the page, or a full-width background image with a play button you can click to play a video from YouTube or Vimeo
• Video with text - similar to the standard video section except with the option to add text on top of or next to the video