Expandable software refers to applications that can be easily modified or enhanced with additional features or functionalities. This flexibility allows users to tailor the software to meet their specific needs, making it more versatile and useful over time. Typically, expandable software supports plugins, modules, or extensions, which can be added without altering the core system. This approach is common in platforms like WordPress or Salesforce, where users can integrate various tools to improve performance and adapt to changing requirements.