Why would I tick the UserID option in the Piwik PRO Tag?
May 23, 2018
UserID may help you recognize visitors, even across multiple devices. Piwik PRO Tag Manager provides an automatic setup of UserID, you only need to create a variable that will be holding the userID value. The value can be anything you like but it’s important for it to be unique to avoid confusing visitors. To see how to implement UserID step-by-step, take a look at our article.