アプリの「スティッキーネス」とは、ユーザーを惹きつけ、定着させるアプリの能力を示す指標です。「スティッキー」なアプリは、ユーザーにアプリに戻ってくる理由を絶えず提供し、忠実なユーザー層と高いエンゲージメント率を維持します。
To calculate app stickiness, divide your daily active users (DAU) by monthly active users (MAU), and multiply the result by 100 to express it as a percentage.

Measuring stickiness is important because it tells developers if users are finding enough valuable content in the app. High user stickiness usually leads to high retention rates, good app store reviews, and ultimately, higher revenues.
As a rule of thumb, a stickiness rate over 20% is considered good, while anything above 25% is seen as exceptional.