Ad tech glossary

Idempotency Key

Technical definition

A unique key attached to each request that changes data, so a repeated request has the same effect as the original and does not create duplicates.

The ADLINGO translation

The "don't book it twice" safeguard. Networks hiccup. Agents retry. A retried request could book the same $100K buy a second time. The key lets the system spot the repeat and ignore it. Unsexy, but essential.

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