SITE.su is an online marketplace specializing in premium domain names, including keyword-based domains and existing websites. The store advertises a selection of more than 40,000 domains in the .ru, .su, and .рф zones, available for purchase or rental. Buyers can complete purchases online, with domain administration rights transferred instantly. For rentals, customers can assign their own DNS servers, and rental agreements include a priority right to buy the domain at a price fixed in the contract. Rental terms can last up to 50 months.

The marketplace helps customers explore its inventory through keyword searches, advanced search filters, and full domain lists that can be viewed or downloaded as spreadsheets. Listings may include purchase and monthly rental prices, domain age, and search-related metrics. Customers can also contact the store with questions or propose a price through its inquiry form. SITE.su provides a help section and online chat for assistance. Its services are designed for individuals and organizations seeking memorable domain names for websites, brands, or online projects.