A software bug refers to an error, flaw, or unintended behavior in a software program, often leading to incorrect results or crashes. A feature request, on the other hand, involves a suggestion for new functionality or enhancements that users would like to see in the software. While bugs need immediate attention to rectify issues affecting user experience, feature requests focus on improving software value and usability. Understanding the distinction helps software developers prioritize tasks effectively and ensure both quality and user satisfaction in their products.