SITE.su is an online marketplace specializing in premium domain names, including keyword-based domains and websites in the .ru, .su, and .рф zones. The store lists tens of thousands of names for businesses and individuals seeking a relevant online address. Customers can search by words or topics, use expanded search options, review domain details, and browse or download the full catalog.

Domains are available for immediate purchase or monthly rental. A purchase includes the transfer of domain administration rights, while renting lets customers assign their own DNS servers. Rental agreements provide a priority right to buy the domain during the agreement period, with the purchase price fixed in the contract; agreements can last up to 50 months. Buyers and renters can place orders online, and prospective customers may contact the store to ask questions or propose a price. SITE.su also offers help and online chat through its support section. Its services are designed to make domain selection and acquisition accessible for a range of online projects.