If we put \b at the end of line then not any change in output. Why ❓

Question

I try this in Sololearn compiler.

Answer 1

Maybe it doesn't work on sololearn, but I tried:
print("Hello\b world!")

on pydroid and got:
Hell world!

as output. (Didn't work on SoloLearn.)

Answer 2

its short for backspace.