Programmatic Fundamentals

Foundational ad tech. Ecosystem, DSPs, SSPs, auctions, identity, private vs open marketplaces.

Why programmatic matters

Programmatic is the underlying infrastructure for nearly all display, video, audio, and CTV advertising. Understanding it enables strategic decisions about DSPs, exchanges, identity, and measurement.

Ecosystem

• Advertisers use DSPs to buy.
• Publishers use SSPs to sell.
• Exchanges mediate auctions.
• Data providers supply audience signals.
• Verification partners check brand safety.
• Measurement partners track performance.

DSP role

• Major DSPs: The Trade Desk, DV360, Amazon DSP, Microsoft Invest (Xandr), Yahoo DSP.
• Buy across multiple exchanges and inventory sources.
• Audience targeting, bidding, optimization.
• Vary in fees, capabilities, transparency.

SSP and exchange

• Major SSPs: Google Ad Manager, Magnite, PubMatic, OpenX.
• Publishers sell inventory via SSP.
• Exchange runs auction between bidders.
• Header bidding lets publishers run multiple SSPs simultaneously.

Auction dynamics

• Most exchanges shifted to first-price (2019–2020).
• First-price means you pay exactly your bid.
• Bid shading services help (predict optimal lower bid).
• Auction floor prices set by publisher.
• Quality and brand-safety filters before auction.

Identity in programmatic

• Third-party cookies degraded; deprecated on Chrome.
• Universal IDs: UID 2.0, ID5, LiveRamp RampID.
• First-party data activation via DSPs.
• Contextual targeting resurgent.
• Privacy Sandbox APIs forthcoming.

Private vs open marketplaces

• Open Exchange: Public auction; broad inventory; lower quality control.
• Private Marketplace (PMP): Negotiated access to premium inventory.
• Preferred Deal: Fixed price, priority access.
• Programmatic Guaranteed: Fixed volume, fixed price.
• Premium brands lean PMP/PG; performance leans Open.

Advanced playbook

• DSP selection rigorous: fees, transparency, capabilities.
• Bid shading for first-price exchanges.
• Quality scoring and filtering aggressive.
• Brand safety verification (DV, IAS, MOAT).
• Identity strategy beyond third-party cookies.
• First-party data activation.
• Quarterly DSP performance review.
• Annual vendor RFP if scale justifies.
• Supply path optimization.
• Cross-screen measurement strategy.

Common mistakes

• DSP chosen by inertia, not capability fit.
• Open Exchange only; missing premium quality.
• First-price bidding without shading.
• Brand safety verification absent.
• Identity strategy still cookie-dependent.
• First-party data not activated.
• Supply chain opaque; agency markups invisible.
• Audience targeting without quality filtering.
• Measurement disconnected from buying.
• Annual review absent.

Operating checklist

• DSP selected with rationale documented
• Bid shading for first-price exchanges
• Brand safety verification active
• Identity strategy beyond cookies
• First-party data activated
• PMP/PG strategy for premium
• Supply path transparency
• Quarterly DSP performance review
• Cross-screen measurement
• Annual vendor evaluation

Part of the Programmatic / CTV series.