There’s a hard limit on interest group metadata size, both per IG (1MB) and in total size (10MB). In Google Ads, a significant chunk of the metadata is used to store renderURLs.

As renderURLs have a specific format (boiler plate with some identifiers), we wonder if the API allows some compressions, e.g., by having a template and only providing the identifiers for each renderURL.

For Bidding and Auction service, there’s a concept of adRenderId to reduce the payload size to be sent to the server. However, we still need to store the full renderURL on the device, and hence, this mechanism doesn’t help with the metadata size issue.