The time it takes for the first header bidding request to be made. This is the interval from page load until the first header bidding request is issued.
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 header bidding request to be made. Ensuring that other, more specific audits are passing should have a major impact on this metric. In particular, the following audits are likely to affect this time:
- Ad request waterfall
- Avoid long tasks that block ad-related network requests
- Load GPT and bids in parallel
This metric identifies "first bid request" as the earliest recorded request to a supported ad exchange or supply side platform.