On the Query Anatomy page, the section P—Cache the results of this query has the text:
More on caching in Retool here.
But the link leads to a page that has nothing to do with caching.
I'm guessing that hyperlink should point to the Caching in Retool page.
Thanks @dguzzo for bringing this to our attention! We appreciate our community users (like you) helping us further improve our product. Our docs team has been notified and will be updating this soon. 
This has now been properly updated. Thanks again for bringing it to our attention!
You're welcome!