In short: Brand DNA, Graphics, then Upload.
Graphics are the supporting cast of your visual identity: illustrations, patterns, textures, product images. The things that are recognisably yours but are not the logo.
A good library here is what stops generated work reaching for something generic.
Upload what you have
Add illustrations, patterns and product imagery. Anything a layout might reasonably need that is not a photograph or your mark.
Keep it findable
Filters and Sort matter more here than elsewhere, because graphics libraries grow quickly and an unfindable asset may as well not exist.
Set the usage rules
The Usage Guidelines tab covers how these elements should and should not be used, which is worth doing for anything with a right and wrong orientation or crop.
Everything here is available to campaigns and sketches automatically, and is preferred over stock.
