Which data is collected by Google Analytics PageView?

I am reviewing the privacy of data collected by Google Analytics when collecting on the default PageView action. Here is the code snippet being used:

<script> 
                (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){

                (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),

                m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)

                })(window,document,'script','https://www.google-analytics.com/analytics.js','ga');

                ga('create', 'UA-1111111-11', 'auto'); 
                ga('send', 'pageview'); 
</script> 

I can't find any clear answer as to exactly which data is being collected. I want to make sure that no PII or PHI will be collected by accident if the page being tracked contains some, such as name, phone, medical info, etc.

Is there any clear guide that states which data is collected for PageView?