Code a developer embeds in an app to add a vendor's functionality: showing ads, measuring installs, collecting analytics, managing consent. Every SDK adds app size, crash risk, and data flows, so publishers limit them and privacy regulators scrutinize them.
Cite this entry:
Agency Echelon. "SDK." Agency Echelon Reference, reviewed September 2026. https://agencyechelon.com/reference/glossary/sdk/