편지왓숑 is an online letter-writing and postal mailing service operated by C&L. It lets customers compose letters online, choose from a variety of designed stationery and envelopes, add photographs, and send their messages through the post. Users can select regular or registered mail, with completed letters submitted to the postal service for delivery. The platform also offers features such as draft saving, mailing updates, customer support, and custom stationery options, making it easier to create and send a personal letter.

Beyond letter services, 편지왓숑 provides books for sale, including novels, comics, and practical titles, as well as themed digital content and downloadable materials. Its site features seasonal designs, promotions, events, and reader reviews, and allows customers to request materials they would like to see offered. By bringing writing, stationery selection, postal dispatch, and related reading products together, 편지왓숑 provides a convenient way to share personal messages and discover complementary content online.