The document discusses Tealium's Data Layer Enrichment API, which allows users to enrich data at the data layer level across digital assets and customer interactions. It provides order, unification, security and control of data. The API flow involves creating JSON files with enrichment data, uploading them to Tealium's servers, retrieving the data via the utag.js file to supplement the on-page data layer, and verifying that the enrichment occurred correctly.
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