HoantienMS is a cashback service that helps shoppers earn back part of the commission generated by eligible purchases. It supports shopping on Shopee, TikTok Shop, and Lazada, while allowing customers to use marketplace discount codes and vouchers. To get started, shoppers copy a product link, submit it through HoantienMS to create a cashback link, then open that link and complete their purchase. Once the order has been received and confirmed by the marketplace, the cashback is credited to the user’s HoantienMS wallet and can be withdrawn to a bank account.

The service also provides step-by-step guidance on creating links and making purchases successfully, including reminders about shopping carts, tracking links, and browser ad blockers. HoantienMS offers a referral program: members can earn a stated 10,000₫ reward when a referred user registers and completes a qualifying cashback order, along with ongoing commission from that user’s cashback orders. Users can access the website through a mobile browser and add it to their home screen for convenience.