Final answer:
Noise reduction in PagerDuty is facilitated by the Event Intelligence product add-on which uses machine learning to filter alerts and reduce noise.
Step-by-step explanation:
Noise reduction in PagerDuty primarily happens with the product add-on known as Event Intelligence. This particular add-on applies machine learning and other filtering techniques to reduce the noise from alerts and incidents. It helps teams to focus on the most critical issues by grouping similar incidents, correlating related alerts into a single incident, and reducing the number of alerts that need to be individually addressed. The key with PagerDuty is ensuring that the operational load is managed efficiently and incident resolution times are reduced. Event Intelligence is designed to cut through the noise and help teams respond to the real problems faster.