SITE.su is an online marketplace specializing in premium domain names, with more than 40,000 domains listed across the .ru, .su, and .рф zones. The service helps businesses and individuals find memorable, keyword-focused web addresses for websites and online projects. Customers can purchase domains online, with instant transfer, or rent them by assigning their own DNS servers. Rental options include a guaranteed right to buy, giving customers a path from temporary use to ownership.

The marketplace provides tools to explore its inventory, including keyword search, advanced filters, a complete domain list, and downloadable listings with available metrics. Domain pages display purchase and monthly rental prices, alongside information such as age and search-related statistics. Visitors can place an order using the shopping cart or contact the team to ask a question or propose a price. Email and phone details are required for inquiries, while assistance and online chat are available through the Help section.