The commercial purpose of a restraint of trade clause is :

To protect the legitimate business interests of the employer $($Daniel$)$ such as trade secrets$,$ and confidential information

To prevent an employee from using or disclosing the employer's confidential information, trade secrets or intellectual property for the benefit of a competitor or for personal gain for a certain period after the termination of employment. In other words, to prevent former employees from competing unfairly with their previous employer and to ensure that the employer's investment in training and knowledge transfer should not be used against the employer.