The purpose of a covenant not to compete, in the employer/employee context, is to restrict what an employee may do after leaving a company.

Covenant Not to Compete

an agreement often found in employment contracts restricting an employee's ability to work in similar employment or start a competitive business within a specific time frame and geographical area after leaving a job.

Employer/Employee Context

The environment and circumstances surrounding the relationship between an employer and their employees, which includes rights, obligations, and expectations.

Restrict

To limit or control the size, amount, or range of something through regulations or conditions.