NS1 is an intelligent DNS and traffic management platform that helps optimize network infrastructure performance and speed application delivery to end-users. It supports the edns0-client-subnet (ECS) DNS extension and Filter Chain technology, which minimize application latency over existing infrastructure. Datadog's NS1 integration collects key performance and usage metrics, such as query rates and lease counts, and visualizes them in an out-of-the-box dashboard, enabling a top-to-bottom view of services on a single platform. The integration also tracks query rates across zones, records, and accounts, and uses machine learning features to improve DNS visibility and detect potential issues. Additionally, Datadog provides visibility into Pulsar performance and availability, as well as NS1 usage metrics to help optimize costs.