Trunk-based development (TBD) is a practice that enhances continuous integration by merging small, frequent changes into the main branch, using feature flags to manage the release of these changes and ensure incomplete features remain inactive. This approach differs from traditional branching strategies, such as gitflow, where feature branches are long-lived, and code merges occur less frequently, often causing complexity and merge conflicts. TBD encourages constant integration, ideally daily, which reduces merge complexities and accelerates continuous integration/continuous deployment (CI/CD) processes. While the method presents challenges, such as the potential for code collisions and difficulties in managing production releases, feature flags provide a solution by allowing changes to be merged without activating unfinished features, thus maintaining safe and frequent deployments. The integration of feature flags with TBD enables teams to increase their velocity and release quality by minimizing the risks associated with incomplete or untested code, positioning feature flags as a crucial component for successful trunk-based development.