Mobile audits now simulate slow network and CPU speeds by default.

Reduce latency of first ad request

Overview

The time it takes for the first ad request to be made. This is the interval from page load until the first ad request is issued.

Recommendations

This metric is not indicative of a specific issue. It should be used to help identify areas for improvement and track that improvement over time.

The goal here is to reduce the time it takes for the first ad request to be made. Ensuring that other, more specific audits are passing should have a major impact on this metric. In particular, audits affecting tag load time and latency of first ad request (from tag load) are likely to affect this metric.

More information

This metric identifies "first ad request" as the earliest recorded request to one of:

Library Host Path
AdSense googleads.g.doubleclick.net /pagead/ads
Google Publisher Tag securepubads.g.doubleclick.net /gampad/ads

Avoiding Common GPT Implementation Mistakes
Tagging best practices to minimize page latency