SITE.su is an online marketplace for premium domain names, offering more than 40,000 domains, primarily in the .ru, .su, and .рф zones. The service helps businesses and individuals find memorable, keyword-focused web addresses, with listings that can be browsed through search tools and downloaded as a complete catalogue. Customers can buy domains online with immediate transfer or rent them by assigning their own DNS servers. Rental options may include a guaranteed right to purchase, and prospective buyers can contact the marketplace to ask questions or make an offer.

The site presents domains related to insurance and other themes, including strahovye.ru and Russian-language alternatives, with displayed purchase and monthly rental prices. Listings may also show details such as domain age and search-related metrics. Customers can use the expanded search to explore domains by keyword, spelling, synonyms, or translation, then complete a purchase or rental through the available online process. SITE.su also provides account access, customer assistance, and an online chat through its help section, supporting users as they compare options and choose a domain.