SITE.su is an online marketplace for premium domain names, offering a catalog of more than 40,000 domains in the .ru, .su, and .рф zones. Customers can buy a domain with an online transaction and immediate transfer of administration rights, or rent it by assigning their own DNS servers. Rental agreements include a priority right to purchase the domain during the rental period, with the purchase price fixed in the contract. Rentals are priced by calendar month, and contracts may run for up to 50 months.

The marketplace provides search tools for finding domains by keyword or other parameters, along with downloadable domain lists and information such as age and SEO-related ratings. Visitors can submit questions or offers, and contact support through the Help section and online chat. The listed domain dekoracii.ru illustrates the service: it is available for purchase or monthly rental, with pricing and domain metrics displayed. SITE.su serves individuals and businesses seeking a relevant web address for an online project.