SITE.su is an online marketplace specializing in premium domain names, including keyword-focused domains and websites. The store advertises a catalog of more than 39,000 names, with listings in the .ru, .su and .рф zones. Customers can browse available domains, search by one or more words, use advanced search filters, or view and download the full catalog, including a spreadsheet with domain information.

SITE.su offers two ways to obtain a domain: immediate online purchase or monthly rental. A purchase transfers the rights to administer the domain, while rental allows the customer to set their own name servers. Rental agreements include a priority right to buy the domain, with the purchase price fixed in the contract; agreements can last up to 50 months. Listings show purchase and rental prices, along with details such as domain age and search-related indicators. Customers can submit questions or propose a price through the site, and the Help section provides contact details and online chat.