I am using the Google Chrome profiler to run a speed audit on my site.
It is complaining about a file show_ads_impl.js
I am not 100% sure where that is coming from? I took out AdSense from my page and now just have the Google AdWords retargeting being set. But I added the async tag to that script.
This is the page I am working on: here
And here is the screenshot of the profiler's complaint:
Also, the profiler suggests to use
<link rel="preload">
But where do I add that?
You would add the link rel... to the head section of the page. One trick I use is to load the page, then the scripts on the page. I'm not sure where you currently have the scripts linked in your markup, but try linking them down at the bottom, just above the Body closing tag. The whole page loads, then the ads load - same time total, but the user won't notice.