SITE.su is an online marketplace specializing in premium domain names, offering more than 40,000 domains for purchase or rent. Its listings focus on keyword-based names in the .ru, .su, and .рф zones, with options for immediate online transactions. Buyers can purchase a domain with the transfer of administration rights, while renters can use the domain by assigning their own DNS servers.

The rental service includes a contractual priority right to buy the domain during the rental period, with the purchase price fixed in the agreement. Rental prices are presented per calendar month, and agreements can last up to 50 months. Customers can browse the full domain catalogue, download listings, and use advanced search tools to find names by relevant words or other criteria. The marketplace also provides domain information such as age and search-related indicators, helping customers compare listings. For questions or price offers, users can contact the store through its help section and online chat.