SITE.su is an online marketplace specializing in premium domain names, with a catalog of more than 40,000 domains in the .ru, .su, and .рф zones. The store offers domain names for both purchase and rental, including keyword-based options intended for businesses, websites, and other online projects. Customers can complete purchases online, with domain administration rights transferred promptly, or rent a domain by assigning their own DNS servers. Rental agreements include a priority right to buy the domain during the rental period, with the purchase price fixed in the contract; agreements may run for up to 50 months.

The website provides tools to browse the full domain list, download listings in Excel, and search by words or other parameters. Listings may include pricing, domain age, and indicators related to search popularity and SEO appeal. Visitors can contact the store through its help section or online chat, ask questions about a domain, and submit a price offer. SITE.su presents domain acquisition and rental as flexible ways to secure a suitable web address.