Two ways to identify a song
Listening works when the recording is playing, and is usually quick. Humming works from memory, and gives you a shortlist to check by ear, because a hum is never certain.
What makes it different
It runs in any modern browser, with nothing to install and no account. You can play each result to make sure it's your song.
What to expect
It can only identify songs in its catalogue, and most popular music isn't in it yet. Artists and labels can add music they have the rights to.