After-sales service refers to the attention given to customers after they have purchased a product or service. There are a variety of synonyms for this term, all of which essentially refer to the same concept. Some alternatives include customer service, post-sale support, and product support. Other terms that can be used include maintenance, repair, and technical assistance. Regardless of the term used, it all boils down to the idea of taking care of customers once they have made a purchase. Providing good after-sales service is essential for building customer loyalty and ensuring that customers remain satisfied with their purchase over the long term.