The Dependency Map Navigator is a tool provided by Datadog that offers detailed visibility into the flow of traffic through resources, such as specific endpoints or queries, from upstream to downstream service dependencies. This visibility enables users to quickly pinpoint repetitive requests to services in downstream call paths and troubleshoot issues in upstream services. The tool helps identify load amplification in downstream services, which can drag down application performance and drive up costs, by displaying the upstream and downstream service dependencies of any resource selected. It also facilitates expedited incident response by quickly identifying large upstream callers and providing vital information for internal coordination among teams. By using the Dependency Map Navigator, engineering teams can quickly zero in on costly performance inefficiencies in downstream services and speed up troubleshooting during incidents.