Hi Charles, good question.
With 1902 Enhancement, has BMC published follow news ..:
Use Google Analytics to collect and analyze usage data
You can now use Google analytics for collecting and analyzing usage data, and make informed decisions on the catalog items in 19.02. With this release, you have access to data about the device, browser, operating system, time, and search keywords used by your users.
In 1908 , i can't find anymore the Google Analytics, but other Analytics option, but i don't know how it works..
With regard to knowledge articles, DWP in most cases uses BMC Remedy Knowledge Management as a backend. So it probably will be accessible for Smart Reporting.