AdRoll, as a prospecting and retargeting platform, relies heavily on real-time monitoring of its system to handle over 70 billion requests daily, with each request needing to be processed in under 100ms. The company has a globally distributed infrastructure of up to 3,000 machines across the globe, generating seven trillion events every day, which are monitored for unexpected issues that could lead to costly errors and domino effects. AdRoll's monitoring philosophy prioritizes swift action over coddling instances, allowing engineers to approach issues calmly and utilizing a Blue-Green deployment strategy to minimize downtime and maximize efficiency.