Almost all features and reports in Piwik are documented in their own pages.
Some of these features have a Help icon in the Piwik software, linking to the relevant user guide.
However several features have a user guides but don't have a help icon yet:
Ideally all doc pages should be linked from the Help icon for consistency.
When this ticket is closed, all features that have a user guide on piwik.org will be clearly linking to this user guide. This will help users make better use of Piwik and help them discover new features!