It is recommended (but not required) to install the PHP Sodium extension.
Features
Serve Google Tag Manager JavaScript from your own domain
Normally, Google forces browsers to re-download the JavaScript every 15 minutes, which can hurt your site rendering speed. If you choose to serve it from your own domain, the time between re-downloads is set to 30 days. It also allows you to serve it from the network edge (for example cached in Cloudflare’s data centers).
Google Analytics API
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