What is feature stickiness?

Feature stickiness is a metric that shows how much users continue to use a specific product feature after their first use.

It reflects user retention at the level of a particular feature, not the entire product. High stickiness indicates that the feature is useful and encourages repeated interaction, which is important for assessing value and prioritizing product development.

For example, if an app has a 'send messages' feature, feature stickiness will measure what percentage of users who tried sending a message do so regularly.