In software development, merging is the process of combining changes from different versions of code into a single unified version. When multiple developers work on the same project simultaneously, each creates their own version with changes. Merging integrates these changes, hopefully without conflicts. Version control systems like Git manage merging automatically when changes don't overlap, but require human intervention when the same code sections were modified differently. Municipal IT departments manage code merges when developing or customizing software systems. Understanding merging concepts helps non-technical staff appreciate why software changes require careful coordination and testing before deployment.