How to Build Cross-Platform Ad Targeting (Lookup, Mapping, and Campaign Creation)

Cross-platform ad targeting involves creating a consistent strategy to display ads across various advertising integrations, each of which uses unique identifiers, structures, and validation rules, making the process one of the most complex challenges in advertising systems. The guide outlines a method using the Unified Advertising API to address these challenges by looking up valid targeting identifiers, mapping them into a consistent structure, and applying them at appropriate levels, primarily at the group level rather than the campaign level, due to the varying capabilities of different platforms like Meta, Google, and TikTok. It emphasizes the importance of handling provider differences and using a unified lookup endpoint to standardize the targeting structure, which reduces the need for per-integration mapping logic and minimizes maintenance risks. By ensuring IDs are reliably used and adjusting UI options based on support capabilities, the guide aims to enable effective cross-platform campaign management that avoids the complexities and costs associated with maintaining separate logic for each integration.