A call center agent's job is to professionally handle customer interactions via phone, email, or chat to provide information, resolve issues, and process orders or payments. Key responsibilities include answering calls, listening to customer needs, providing product and service details, troubleshooting problems, managing complaints, updating customer records in a CRM system, and escalating complex issues to management. Agents must possess strong communication skills, problem-solving abilities, and empathy to build customer loyalty and represent the brand effectively.