Forum Moderators: phranque
But no problem in Paid tracking.
What does "Keyword not defined" mean in the Referers > Search Engines keywords report?
Some search engines (Google, DuckDuckGo, etc.) may not specify the keyword used to reach your website, but instead will hide the keyword for privacy reasons. In this case, Piwik will report the keyword as "Keyword not defined". It means that Piwik has detected that the visitor came from a search engine, but the keyword was not provided in the Referrer URL.
There is no way to access the keyword in this case, and no other web analytics tool can get this information either.