Starbucks uses various online strategies to engage customers and promote its mission statements of inspiring people and environmental leadership. These strategies include an online community site where customers can share drink ideas and feedback, promotional codes on cups that must be entered online for prizes, mobile text offers for discounts, and an online "Clean Up" pledge button to drive donations for environmental cleanup. The strategies are designed to strengthen Starbucks' online and in-store communities while measuring their effectiveness through tracking promotional participation and pledge button clicks.