From top to bottom, the first element on the homepage is the Frontpage feature. This is the carousel that runs in the home page bannerThe boxes of content that appear under the top banner on your homepage are called Frontpage Promos. Similar to the Frontpage Features, the promos include an image, title, and blurb, but everything appears much smaller on the page.
...
Instructions
Go to Content > Create content > Frontpage Promo
Add a Title
Add a Teaser
...