What are Stars and how do I earn them?
A Star is a way to keep track of your progress toward Rewards and benefits earned as a member of the Starbucks Rewards program. There are a number of ways to earn Stars:
In-Store Transaction and Online
Each time you pay for your purchase with a registered Starbucks Card or Starbucks Mobile app at a participating Starbucks®, Evolution Fresh™ or Teavana® store, or online at Store.Starbucks.com or Teavana.com, you will earn two  Stars per $1 spent on the amount of your purchase that is accruable [eligible to earn Stars].
You can earn Bonus Stars through personalized offers, such as Star Dashes. Opt in to email to receive these offers. The number of Bonus Stars offered varies by offer.
You can earn Stars when you purchase specially marked Starbucks products in your grocery store. The number of Bonus Stars depends on the product.