What is a job description?

A job description is one of the most fundamental documents in any hiring process, yet many businesses — particularly at the early stage — create them as an afterthought or copy from generic templates without fully thinking through what the role requires. Understanding what a job description is and what it needs to achieve helps founders write ones that attract the right candidates and set the role up for success.

A job description defines the responsibilities, requirements, and context of a specific role. It typically covers the purpose of the role, the main tasks and activities it involves, the skills and experience required, the reporting structure, and the location and terms of employment. Beyond its function as a recruitment tool, a job description provides clarity for the person hired — setting expectations about what success looks like and how the role relates to the broader business.

A well-written job description attracts candidates whose skills genuinely match the role, reducing time spent screening unsuitable applications. It also reduces the risk of misunderstanding between employer and employee about what was expected. Our guide to writing job descriptions for UK founders covers what to include and how to make a role clear and compelling to the right candidates.