This study explores how a web-based dyadic intervention can help patients with colorectal cancer and their caregivers manage symptoms like fatigue, depression, and pain. Dyadic intervention means the program involves both the patient and their caregiver working together. The study focuses on patients undergoing chemotherapy and aims to improve their quality of life and health outcomes. Over 8 weeks, both patients and caregivers will use the CRCweb tool, participate in interviews and complete surveys to see how well the program works for them. Participants must be over 18 years old, have access to the internet, and speak English. Patients should have colorectal cancer, be on chemotherapy, and report at least two symptoms like fatigue or depression. Caregivers must be primary supporters of the patient.

• The trial lasts 8 weeks and includes interviews and surveys.
• Participants need internet access and must speak English.
• The study is designed to improve life quality for patients and caregivers.