Vehicle listings, on Outdoorsy.com and Wheelbase integrations on dealer websites, prominently display text beneath the photos (See 2 images below). This text is pulled from the Highlights and Description fields of a vehicle's settings.
How to Edit Highlights & Description
Go to VEHICLES in the Main Menu
Click on the vehicle name
Go to the DETAILS tab
Scroll to the bottom
Edit/add text in the HIGHLIGHTS and/or DESCRIPTION fields