Ad network / SSP

SSPs and networks turn publisher inventory into something buyers can access programmatically. Typical work includes:

• Onboarding placements and ad formats.
• Setting floor prices, deal IDs, and blocking rules.
• Running or participating in auctions (often header bidding / exchange paths).
• Reporting fill, eCPM, and loss reasons back to publishers.

A classic ad network may also package remnant inventory across many sites; a modern SSP emphasizes transparent, real-time selling into exchanges and DSPs.

Aggregation metrics blend supply health with marketplace efficiency:

• Fill rate / Match rate — demand coverage.
• eCPM — yield on sold impressions.
• Floor price — minimum acceptable bid.
• Win rate (seller view) — how often inventory clears.
• Latency — auction / ad-decision speed that protects UX.
• Take rate — platform fee share, when disclosed.

Good SSP operators optimize publisher yield and buyer access at the same time.

• Publishers supply inventory and commercial constraints.
• Exchanges clear open auctions and private marketplaces.
• Advertisers / DSPs bid into those paths.

When debugging a bad day, separate publisher fill, SSP routing, and exchange clearing — one dashboard rarely tells the whole story.

• Treating every “network” as identical to an open exchange.
• Raising floors globally without segmenting inventory quality.
• Ignoring timeout / latency losses that look like “no demand.”
• Reporting eCPM without clarifying whether fees are net or gross.