This document provides an overview of non-small cell lung cancer (NSCLC). It discusses that NSCLC is the leading cause of cancer death, with the majority of cases diagnosed at an advanced stage. Smoking accounts for 90% of lung cancers. Screening trials have shown a 20% reduction in lung cancer mortality with low-dose CT scans. Surgical resection is the main treatment for early stage disease, while chemotherapy, chemoradiation, targeted therapies, and immune checkpoint inhibitors are used for advanced disease based on mutation status and histology. New targeted therapies and immunotherapies have improved outcomes for subsets of NSCLC patients.