Who knows what is the function of x y on svg tag please help

Question

what happen is that i just don't know the use of this x, y sometimes i've seen as y1, x 1, y2 x2 and so on if someone could at least give me an idea i'd thank you.

Answer 1

https://www.sarasoueidan.com/blog/nesting-svgs/

Answer 2

thanks!!