A place to list specific experience in a bullet point fashion; augmenting the description. Like a resume for the horse.

A place to describe the seller’s background, add integrity.

A place for seller’s to describe helpful pointers or special needs of their horse. For example, list of supplements, bits used, warm-up needs, hauling needs, etc. 

Also, a place to disclose maintenance needs like special shoes or injections. This adds a level of transparency never seen before and has potential to build immense trust.