Remnant inventory is the ad space a publisher or network couldn't sell through direct deals or its highest-priority channels, offered instead at a lower, more variable price through open exchanges or run-of-network buys.
A native DSP is a demand-side platform for buying in-feed native ad inventory, though in practice most native volume is bought directly through each network's own self-serve dashboard rather than an open-exchange DSP.
Prebid.js is the leading open-source header bidding wrapper, letting publishers run one unified auction across multiple ad exchanges at once.
Ad inventory is the total amount of ad space a publisher or network has available to sell, whether it's counted in impressions, placements, or feed slots, over a given period.
Privacy Sandbox is Google's initiative to replace cross-site tracking mechanisms like third-party cookies with browser-level APIs for ads and measurement.
A third-party cookie is a small piece of data stored by a domain other than the one a user is currently visiting, used to track behavior across sites.
MFA sites are built to generate ad revenue rather than serve readers, typically thin on content and heavy on ad units and cheap paid traffic.
