An offer letter is a document an employer sends to a job candidate that outlines the terms of a job offer, including pay, benefits, start date, and more. It also includes information on what the company expects from the employee in terms of job duties and responsibilities.

The offer letter is an important tool in the hiring process, as it helps ensure that both the employer and the employee are clear on the terms of the job. It also helps protect the employer from any legal liability that may arise from the hiring process.