We will use a JavaScript:
It is a pity I can not just copy and paste the code here. I think it is a security issue, the editor does not allow me to do that.
In this situation, follow the next link - just to make sure I am not talking bull...it :)
https://www.minddevelopmentanddesign.com/blog/how-to-defer-p...
If you'll copy the code from there, don't forget the <script> in beginning and in the end.
As I can see it is missing on their page:
They say to add this to a .js file and enqueue it along with the rest of your Javascript files in functions.php.
On another site I found another solution, to add this java script before the end tag in the body of your post.
Really? These two options break my mind, I tryed a lot to find the second location. I didn't try the first one.
These are much over my experience and knowledge.
What I've done and works perfect for me on my both sites I run (The print screens I will add in the next pages are with my site, so you'll know it is working) I added the code before the body end tag in Appearance - Theme editor - theme footer.
See the first photo on this page, do exacly the same. Leave the spaces as I did, if you want to remove it, it will be very easy as you let the code visible for selection.
Ok, this is not all ... let's continue with the next things to do :)
I am not exactly sure where, though I believe the answer is in this statement "You’ll want to add this to a .js file and enqueue it along with the rest of your Javascript files in functions.php."
But a screenshot on this may help the less tech-savvy people on knowing where to add the codes.
Molly G