Programmatic

Ad Exchange — Definition & Explanation

A digital marketplace where publishers and advertisers buy and sell ad inventory through real-time auctions. Ad exchanges connect supply-side platforms (SSPs) with demand-side platforms (DSPs) to facilitate programmatic transactions.

How Ad Exchange Works

Ad exchanges operate as neutral intermediaries that aggregate supply from SSPs and demand from DSPs. When a publisher makes an impression available, the exchange broadcasts a bid request to connected buyers, collects bids in milliseconds, and returns the winning creative to display.

Why Ad Exchange Matters for Publishers

For publishers, ad exchanges unlock access to thousands of potential buyers simultaneously, creating competitive pressure that drives up CPMs. Working with a well-connected SSP like Stellor Media ensures your inventory reaches the best exchanges and demand partners.

Frequently Asked Questions

How does an ad exchange differ from an ad network?

Ad exchanges use real-time bidding so prices are set dynamically per impression. Ad networks bundle inventory and sell it at pre-negotiated rates, with less transparency.

Which ad exchanges does Stellor Media connect to?

Stellor Media connects to 50+ demand partners including major exchanges, DSPs, and trading desks to maximize competitive pressure on every impression.

Do publishers need their own ad exchange relationship?

No. Publishers access ad exchanges through their SSP. Stellor Media manages all exchange relationships so publishers only need a single integration.

Related Terms

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