Professional services and support services differ mainly in their purpose and level of specialization. Professional services involve expert knowledge, advanced skills, and formal qualifications, such as legal, accounting, consulting, engineering, or IT advisory services. These services focus on strategic, technical, or compliance-related tasks that require judgment and expertise. Support services, on the other hand, handle routine, operational, or administrative functions that help businesses run smoothly. Examples include housekeeping, security, customer support, data entry, payroll processing, and facility management. While professional services shape decision-making and complex operations, support services ensure day-to-day continuity and efficiency across business functions.