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PageSpeed Insights: My performance drops from 92 to 42 if I insert AdSense 0 Recommended Answers 6 Replies 11 Upvotes
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Within my Google Search Console, I've received a warning (for 10,000+ webpages) about "FID issue: longer than 300ms (mobile)".

If I use PageSpeed Insight, I see that the value of "Max Potential First Input Delay" is very different if I use AdSense or not.

Within this PageSpeed tool of Google, I see that, if I remove the ads, the performance boosts from 42 to 92, and the "Max Potential First Input Delay" drops from 600 ms to 100 ms.

Should I be worried?

Thank you.
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HI
Maybe check how  many ads you have on a page - fewer ads, placed lower down the page might help.
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Well surely it makes sense if the page does not have ads will load quicker. 
 
The ads take resources to load. 
 
The less functions and bits on a page the quicker it can load (in general) 
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Speed is relative.  More like a tie breaker than an absolute ranking factor.

Think about it, no way Google is going to rank a THIN screaming fast site better than an informative or quality site.  

Am I wrong?  Optimize your site to be the single fastest site in the world and then try to outrank Apple for the query "Apple Iphone".

So speed is relative.  A way to break ties for very similar ranking sites.  Google could have used pink text or spelling errors, instead Google uses a technical performance factor that impacts visitor experiences.

Speed is also relative in that absolute speed numbers are not meaningful.  No way Google is going to use your 119.93ms load time to rank your site better than the site with the 119.94ms load time.  Too many variables.  So your site is ranked as fast or not-fast.  If both sites are fast, another factor is going to be used to rank the sites to break ties.

So rather than focusing on raw speed numbers, focus on comparing your site relative to the competition.  If the sites are similar load times, Google is going to find something else to distinguish the sites and so should you.
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Hi StevieD_Web, 

Thank you very much for your answer. The point is that:
  • Some weeks ago, I started to use Auto Ads (three ads on mobile pages plus Auto Ads in the 75% level)
  • On Nov 11, I received the "FID issue" warning and, just in the same day, the Average Position of my webpages dropped from 8 to 10, and the traffic declined 30%.

I'm sure that my contents, the Domain Authority, etc. of my pages are better than my competitors', but now I'm really confused about whether his "FID issue" warning and the web speed are affecting my ranking or not.
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Well the Speed reporting in the console only released around 4th November. 
 
... so only just getting reports about it, is because the report itself is 'new'. Not that it a 'new' issue for your site. 
 
The speed reports from Crhome UX report are long term trends, so the FID being slow would of been an issue for a long time. (its just you only just learned about it!) 
Had been able to see the timings via PageSpeed Insights longer than via the console report!
 
 
In fact there are graphs in the speed report. Is there actully a 'change' in results on the graph that corresponds with the ads being added? 
 
 
Frankly I would say the 'Average Position' is just a coincicence, not directly realted. 
 
 
 
 
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Ya Thomas
keeping ads on a webpage will affect your page speed for sure, and you experimented too.
That's why Noone will be running ads in their revenue making webpages from their website.
It will obviously affect your "Page ranking" too
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