Requirements specifications is the process of documenting the functional and non-functional requirements of a project or system. It involves capturing the stakeholder's needs and desires, translating them into specific and measurable requirements, and creating a comprehensive document that serves as a blueprint for the development process. It is a specialized skill that requires expertise in gathering, documenting, and analyzing requirements, as well as deep knowledge of the industry and the project's technical requirements. Effective requirements specification ensures that the final product meets the stakeholders' expectations and delivers the desired outcomes.