This document describes key network delivery metrics for streaming Internet video. The Streaming Video Alliance Quality of Experience (QoE) working group (WG) developed these metrics as a common language to describe effectiveness of network delivery. Although many more metrics could have been documented, these particular metrics represent the most common and important metrics according to the QoE WG group membership. It is expected that these metrics can be used across the streaming video ecosystem to provide guidance that can lead to enhancement of QoE.