It's not worth using. Any halfdecent player will evade it and you will just end up being in a bad opening position.
Why it's easy to use? Because it's four moves long I'd guess.
Four moves
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There have been other conversations on this topic, but, to reiterate, the Scholar's Mate, or four move checkmate, is so well-known, and so easy to see attempting to use it against anyone over 1100 will often lead you to a weak position, as most opponents will have memorized the suggested counter-variations for the mate.
simple answer is against beginner yes against players over 1200 not a chance
Is the four move check-mate worth using? and why is it so easy to see