A service agreement is an agreement between a company and an individual or two companies, stating that one will provide a specific service to the other. A services agreement is used to document a transaction where the seller provides a service to the buyer. Such an agreement may be appropriate for marketing services, advertising services, testing services, consulting services, management services or other professional services. Service agreements are an important aspect of many business and consumer transactions. They create an obligation on the parties to deliver a specific service.