Detection
Checker Bot
A checker bot is an automated crawler run by a third-party ad-compliance monitoring service — BrandVerity, GeoEdge, AdSecure, and similar — used by advertisers, agencies, or ad platforms themselves to scan live ad landing pages at scale for policy violations, including cloaking. It's distinct from an ad platform's own reviewer bot (AdsBot, Googlebot, facebookexternalhit): checker-bot traffic often arrives from IP ranges and User-Agents that aren't as clearly published or documented as a platform's own crawler, making it a harder category to attribute with certainty than the platform reviewers.