What is DNS?
DNS is an address book for the internet where the digital "home" address is shown for each site. For example, yandex.com "lives" at the address 213.180.204.62.
Each time you go to a webpage, the browser looks for its address in the DNS system. The faster the nearest DNS server to you works, the faster the site opens.
How Yandex.DNS works
Speed
Yandex has over 80 DNS servers located in different cities and countries. Each user's queries are processed by the server closest to him/her, that's why sites open faster with Yandex.DNS in "Basic" mode.
Protection from dangerous sites
Some websites on the internet contain malware that is capable of infecting your computer with a virus. Sometimes viruses can be located even on a checked site. Other pages are created by hackers and steal passwords and personal information or take money from telephone accounts. When attempting to open a site in "Safe" and "Family" modes, Yandex.DNS will block the download of any information from it and warn the user. Yandex uses its own anti-virus software that checks sites for malware. Yandex.DNS uses its own anti-virus software operating on Yandex algorithms, as well as signature technology by Sophos.
Protection from "adult" content
Many users want to protect themselves and their children from adult sites. Yandex's family search algorithms can detect erotica and porn. When opening a porn site on a computer or in a network with Yandex.DNS in "Family" mode, the user will only see a closure.