SITE.su is an online marketplace specializing in premium domain names for businesses, projects, and individuals seeking an established web address. The store offers a catalog of more than 40,000 domains, including keyword-based names and domains in the .ru, .su, and .рф zones. Visitors can browse the full inventory, search by words or themes, and use advanced search options to find relevant names. Listings include purchase and monthly rental prices, with information such as domain age and selected search metrics available for many names.

Customers can buy domains online with immediate transfer or rent them by assigning their own DNS servers. Some rental arrangements include a guaranteed right to purchase the domain later. The site supports instant checkout through a shopping cart and provides a way to ask questions or submit a price offer for an individual domain. A complete domain list can also be viewed online or downloaded as an Excel file. Contact information and online chat are available through the Help section, while account access supports registration and sign-in.