Employment contracts are advantageous because they outline all of the terms of the employment relationship and protect both the employer and the employee legally. In general, if an employee quits or resigns, they do not receive remuneration unless the employer agrees to do so. If an employee is fired for no fault of their own, the employer is usually required to compensate them.
This is also true with the company that I’m working with. After meeting with a client with my supervisor and creative director I realized that they discussed a contract with the client before anything else. This is to insure the whole process goes smoothly my supervisor explained to me.