> ## Documentation Index > Fetch the complete documentation index at: https://docs.fiddler.ai/llms.txt > Use this file to discover all available pages before exploring further. # Traffic > Learn how Fiddler tracks your ML and GenAI models' traffic patterns and when to take action when traffic patterns deviate from normal. Traffic as a service metric gives you basic insights into the operational health of your model's service in production. Example of a Fiddler Chart displaying a model's traffic. ## What is Being Tracked? * ***Traffic*** — The volume of traffic received by the model over time. ## Why is it Being Tracked? * Traffic is a basic high-level metric that informs us of the model's output activity. ## What Steps Should I Take When I See an Outlier? * A dip or spike in traffic needs to be investigated. For example, a dip could be due to a production model server going down; a spike could be an adversarial attack.