I've been testing
Microsoft Clarity [webmasterworld.com] for a while now and it's proving to be an incredibly valuable tool.
I'm discovering errors that I didn't spot, and pages that are what really are the "go-to" pages I hadn't expected. Importantly, i'm also finding the exit pages which may not have given the visitor what they wanted.
As a result, i've made changes that have retained visitors for longer, and importantly, i've generated more enquiries from hard won referrers.