SITE.SU is an online marketplace specializing in premium domain names, including keyword-focused domains in the .ru, .su, and .рф zones. The store presents a catalog of around 39,000 to 40,000 domains and helps businesses and individuals find names relevant to their projects. Customers can purchase a domain online, with ownership administration transferred instantly, or rent one by assigning their own DNS servers.

Rental agreements include a priority right to buy the domain during the rental term, with the purchase price fixed in the contract. Agreements can last up to 50 months, and rental prices are listed per calendar month. The site provides search tools for finding domains by matching words, prefixes, synonyms, translations, and other parameters. Visitors can also view or download the full domain list, with some listings including age and search-performance indicators. For questions or price offers, customers can contact the store through its help section, email, telephone, or online chat. SITE.SU focuses on making domain selection, purchase, and rental accessible through a single marketplace.