This study is about helping young women with early-stage breast cancer continue taking their hormone therapy. Hormone therapy involves taking medicines to block cancer cells that need hormones to grow. However, it can have side effects like pain or hot flashes, which might make some women stop their treatment early. In this study, women will be split into two groups. One group will receive special questions via email or text to check on symptoms and get educational materials. The other group will just receive educational materials. The study wants to see if asking about symptoms helps women stick with their treatment.

• The study lasts 72 weeks with regular check-ins and a final phone call at 80 weeks.
• Participants may need to answer questions weekly at first and monthly later on.
• Optional blood samples may be collected at set times.

Women who have stage I-III breast cancer and meet certain criteria can join. They should be able to use a smartphone or computer to answer questions. It's important to stay on treatment to fight cancer effectively.