It's a snap idiom spoken language
To indicate something that is very easy to do.
A: Could you do this tongue twist? B: Sure, it's a snap.
Doing vertical split is not that hard. Actually, it's a snap to me.
Even a newbie could play that song. You're a professor. It's a snap to you.
Okay, I will cook that cake. It's a snap.
Something easy or pleasant to do, especially by comparison to something
To win a competition easily
Especially easy
Used to indicate that something is easy to achieve, it is also easy to lose
To be extremely simple, basic, or intuitive without much skill or effort.
Used to allude that the last force, problem or burden which is seemingly minor and small causes a person, system or organisation to collapse or fail
Her husband's violent act last night was the straw that broke the donkey's back and she left him