The practice of providing expert advice in a particular area, such as management, finance, technology, marketing, human resources, or other specialized fields. Consultancy services are typically offered by individuals or firms known as consultants who possess deep knowledge and experience in a specific domain.

Consultants work with businesses, organizations, or governments to solve problems, improve performance, or achieve specific goals. They may be involved in:

1. Strategic Planning: Helping organizations develop long-term strategies.
2. Operational Improvement: Streamlining processes to enhance efficiency.
3. Change Management: Assisting in managing organizational change, such as mergers or restructuring.