A client service specialist is responsible for providing exceptional customer service to clients or customers of a company. The specific job duties of a client service specialist may vary depending on the industry they work in, but typically include:

1. Customer Service: Client service specialists are responsible for providing exceptional customer service to clients or customers, including responding to inquiries, addressing concerns, and resolving issues.

2. Relationship Management: Client service specialists are responsible for managing and maintaining relationships with clients or customers, and serving as the primary point of contact for all communication.

3. Product and Service Knowledge: Client service specialists must have a deep understanding of the products and services offered by their company, as well as the ability to effectively communicate this knowledge to clients or customers.

4. Account Management: Client service specialists are responsible for managing and maintaining client or customer accounts, including handling billing, invoicing, and other financial transactions.

5. Order Processing: Client service specialists may be responsible for processing orders and managing inventory, as well as coordinating with other departments within the company to ensure that orders are fulfilled in a timely and accurate manner.

6. Reporting and Analytics: Client service specialists are responsible for generating reports and analyzing data to measure the effectiveness of their client or customer relationships and identify opportunities for improvement.

Overall, a client service specialist must possess excellent communication and interpersonal skills, as well as a deep understanding of customer service best practices. Strong problem-solving and analytical skills are also important in this role, as is the ability to work well in a team environment. Client service specialists may need to work outside of traditional business hours and be available for on-call support as needed.