Matomo, the free web analytics tool formerly known as Piwik, does not display referring search keywords (anymore?) without purchasing an add-on, which makes it less valuable than the good old webalizer. I should grab my old backups from 2001 and find a Perl script that crawls Apache server logs. Why must digital progress always mean Verschlimmbesserung?

> Use Search Keywords Performance to see all keywords behind 'keyword not defined'. All keywords searched by your users on Google, Bing and other search engines will be listed