Exit rate
Exit rate is the percentage of all visits which ended on a specific page. Exit rate takes into account the number of people who left your site after landing on a page and compares it to the total number of views the page got.
More about Exit Rate in Piwik PRO Help Center:
https://help.piwik.pro/analytics/exit-rate-vs-bounce-rate/
More about Exit Rate on Piwik PRO Blog: