.РФ is a Cyrillic domain zone. Such names are called IDNs: browsers display them in Cyrillic, while technical systems store them in Punycode — the .РФ zone itself is xn--p1ai.
A Cyrillic address is easy for Russian speakers to remember and dictate. Latin characters are more convenient for email and some services, so businesses often register a pair: brand.ru and бренд.рф.
A website on a .РФ domain works like any other: it needs DNS, hosting and an SSL certificate.
Need help? Nik.Ru specialists will set everything up for you: send an enquiry or ask the consultant.