I always think that, why there is m=1 in wbsite links used html?

Answer 1

Write a more specific question! and then people can help you :)
@Sololearn

Answer 2

This may help :)

http://www.techcrashcourse.com/2015/08/c-graphics-programming-tutorial.html?m=1

and the next question is , if ?m=1 is used for loading the site on mobile, what is its value on opening a site on desktop.

or it automatically changes values on its own?
@Jamie