Use coach marks sparingly. Focus on feature benefits (not features) and a single interaction.
Coach marks can either appear automatically, for example, when users visit a page for the first time or when a new feature is added, or in response to an action, like activating an info icon.
A coach mark points to the targeted UI element on the page. It displays a title, description and either a dismissal link or 'X' icon. Once the coach mark is dismissed, it will not appear again.
Even though users can dismiss a coach mark when they interact with the targeted part of the UI, always include either a link or "X" icon. (This is useful for new features or prompting users to take a specific action.)