What this is
Ad sets handle targeting and budget management within a campaign, tracked in the bg_ad_sets table with objective-based targeting — the layer between a campaign's overall strategy and the individual creatives that actually get shown to users.
How it works
bg_ad_create_adset($campaignId, $objective) creates an ad set tied to a specific optimization goal, which then determines how creatives within it get served and evaluated — objective-based targeting means the platform handles matching an ad set's goal to appropriate placement logic.
Holding BOT for this path
Same ad-tech category BOT holding requirement as ad campaign development — one holding covers the full campaign/set/creative/serving stack rather than a separate requirement per sub-feature.
Related paths in Ad Campaigns