I published a global object windowthe other day to find out what the first meaning was Infinity. Can anyone explain any reason or links to why this is here? I did some research, but did not get any good answers.

I see from MDN that infinity is always part of the global window, but I'm just wondering how / why someone used it? I know this is a general question, but I hope I can get a well-formed answer to help me understand how / when I should use it Infinity.
Link: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Infinity