SITE.su is an online marketplace specializing in premium domain names, with a catalog of approximately 40,000 domains in the .ru, .su, and .рф zones. The store serves businesses, entrepreneurs, and individuals looking for a domain for a website or online project, offering both direct purchase and rental.

Customers can buy selected domains online, with ownership administration transferred promptly, or rent a domain by assigning their own DNS servers. Rental agreements include a priority right to purchase the domain during the rental period, with the buyout price fixed in the contract. Rental is priced by the calendar month, and agreements may last up to 50 months.

The site provides domain search tools, including expanded search options, and lets visitors view or download the full domain list as an Excel file. Customers can ask questions or propose a price for a domain, with contact details and online chat available through the Help section. SITE.su presents domain information such as age and search-related indicators to help users compare available names.