# Load GPT from recommended host

## Overview

This audit ensures that the Google Publisher Tag (GPT) library is being loaded
from the recommended host. The browser must open a connection to each new host
your page references, which can take significant time. By loading GPT from the
recommended host you ensure that all ad serving requests are made to a single
domain, reducing the number of connections to open and improving page load
performance.

## Recommendations

Ensure that GPT is being loaded from `securepubads.g.doubleclick.net`. For
example:

    <script async src="https://securepubads.g.doubleclick.net/tag/js/gpt.js"></script>

## More information

[Assessing Loading Performance in Real Life with Navigation and Resource Timing](https://developers.google.com/web/fundamentals/performance/navigation-and-resource-timing)  

[Get Started with Google Publisher Tags](https://developers.google.com/publisher-tag/guides/get-started)
[View audit source](https://github.com/googleads/publisher-ads-lighthouse-plugin/tree/HEAD/lighthouse-plugin-publisher-ads/audits/loads-gpt-from-official-source.js) [Improve this article](https://github.com/googleads/publisher-ads-lighthouse-plugin/tree/HEAD/docs/audits/loads-gpt-from-official-source.md) [Report an issue](https://github.com/googleads/publisher-ads-lighthouse-plugin/issues/new?labels=documentation&template=documentation-feedback.md&title=Documentation+feedback:+loads-gpt-from-official-source.md)

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