A Skill Matrix is a tool used to assess and display the skills and competencies of individuals or teams within an organisation, typically in a table or grid format. It helps identify the strengths and gaps in knowledge or experience across various roles and tasks, ensuring that the right skills are in place for effective performance. A Site Skill Matrix specifically focuses on the skills needed for various roles on a construction site, for instance, and helps ensure that workers are appropriately trained and qualified for the tasks they are assigned.