insert products randomly

Use insertion After content or After post and ad rotation:
https://adinserter.pro/documentation/automatic-insertion

https://adinserter.pro/documentation/ad-rotation

So if I want to insert multiple ads randomly,
I can just use block 1 and input something like below right?

ad code 1 from Amazon ads
[ADINSERTER ROTATE]

ad code 2 from Amazon ads
[ADINSERTER ROTATE]

…

Yes, but use the separator only between ad options:

ad code 1 from Amazon ads

[ADINSERTER ROTATE]

ad code 2 from Amazon ads

Thanks! I will have a try!

Can I show ads randomly from many products I picked up manually?

I’m using Amazon native shopping ads, and I picked up 4 books in every custom ads.

What I want to do is that I pick up like 40 books in one custom ads, and put ad code in your plugin, and the plugin will pick up four books every time randomly from these books.
Is that possible?

You can only rotate ad codes.