Why do google and yandex redirect to www?

Question

Computer networks

google.com -> https://www.google.ru
yandex.ru -> https://www.yandex.ru
https I still understand, but why www?

Answer 1

historically + load reduction (there is not only ru but also ua and kz and Turkey is probably somehow highlighted)

Answer 2

Why www is still alive

Answer 3

Chill here please. Girls to the left, boys to the right (what is left and right, decide for yourself, I don't care):
no-www.org
www.yes-www.org

Answer 4

Because people who are unfamiliar with Internet technologies mistakenly consider it mandatory for the site and its search on the Internet.

Answer 5

Until now, I see how people in different countries are compulsorily typing www. This part has become accustomed to people's heads as part of any website address on the Internet.

Answer 6

because they comply with the standards (The standard is unspoken).
www - web service
smtp - service for sending messages
ftp - file service
This is due to the division of tasks among different hosts (virtual servers)
, but it seems that it is not fixed anywhere in writing.
I did not find it in these documents:
https://tools.ietf.org/html/rfc1738
https://tools.ietf.org/html/rfc1630