Fiddler is an AI observability platform that helps maintain and optimize machine learning (ML) models' performance by providing continuous monitoring, real-time alerts for issues, and root cause analysis. The integration of Fiddler with Datadog Marketplace allows centralized monitoring of ML models and applications within a unified platform. This enables teams to track performance metrics, identify suboptimal model performance, and determine the root causes of issues. By making ML models more transparent, Fiddler helps establish trust in AI among various stakeholders.