Optimize Google Analytics / Google Tag Manager via Preconnect Headers

Add the following before the tag in your html to give google analytics loading a little boost and make the pagespeed and chrome auditing tool happy with your site

<link rel="dns-prefetch" href="https://www.google-analytics.com">
<link rel="dns-prefetch" href="https://www.googletagmanager.com">
<link href="https://www.google-analytics.com" rel="preconnect" crossorigin>
<link href="https://www.googletagmanager.com" rel="preconnect" crossorigin>

These optimizations can speed up your page load.
Opportunity: Preconnect to required origins
Consider adding preconnect or dns-prefetch resource hints to establish early connections to important third-party origins. Learn more.

/h/8913147.html in Google Analytics Spam

The page “/h/8913147.html” is part of a Google Analytics Spam campaign published by get-seo-help.com
It is likely the uniqueness of the url is utilized to avoid being filted by Google.

I’ve also seen the same html page being used for referrer spam from  free-seo-consultation.com