SITE.su is an online marketplace specializing in premium domain names, including keyword domains in the .ru, .su, and .рф extensions. The store presents a catalogue of more than 40,000 domains, with listings that include purchase and monthly rental prices, along with details such as domain age and search-related statistics. Customers can buy a domain online with immediate transfer or rent one by assigning their own DNS servers. Rental agreements may include a guaranteed right to purchase the domain later.

The marketplace offers tools to browse the full catalogue, download domain listings, and search by keywords or other criteria. Listings include matching names, synonyms, and transliterations, helping visitors explore alternatives to a particular domain. For example, the otryvok.ru listing is shown alongside related domain suggestions. Customers can contact the store through its help section or online chat, ask questions about a domain, and propose a price. SITE.su is designed to make finding, comparing, buying, and renting Russian-language domain names straightforward.