A more thorough explanation:

An employment agency is a business that helps people find jobs and employers find employees. They charge a fee for their services, which can be paid by either the employer or the employee depending on the agreement.

John is looking for a job as a software developer. He goes to an employment agency and provides them with his resume and job preferences. The agency then matches him with potential employers who are looking for someone with his skills. If John gets hired, the agency will receive a fee from either John or the employer.

Another example is when a company needs to fill a position quickly and doesn't have the time or resources to do it themselves. They can hire an employment agency to find qualified candidates for them. The agency will screen and interview potential candidates and present the best ones to the company for consideration.

These examples illustrate how an employment agency acts as a middleman between job seekers and employers, helping both parties find what they need.