SITE.su is an online marketplace specializing in premium domain names, offering more than 40,000 domains for businesses, projects, and individuals to browse. Its listings include names in the .ru, .su, and .рф extensions, with options to purchase a domain or rent it by the month. Buyers can complete purchases online, with domain administration rights transferred immediately. Rental agreements allow customers to use their own DNS servers and include a priority right to buy the domain during the rental period, at a price fixed in the agreement. The maximum rental term is 50 months.

The marketplace provides domain search tools, including expanded searches, synonym and transliteration suggestions, and downloadable listings. Individual listings may show purchase and monthly rental prices, domain age, and search-related indicators. Customers can submit questions or propose a price through the site, and assistance and online chat are available in its help section. SITE.su presents its catalog as a practical resource for finding and securing domain names for an online presence.