What's the meaning of " interest" here ?

[japanjapan]

Dear teachers,

Here is a sentence:

Yound man, my advice is to do what you believe to be in your best interest.

Does "interest" here mean " a state of curiosity, a need to know" or " advantage, benefit" ?

Thanks

[Marylin]

Does "interest" here mean advantage, benefit" ?

That's right
to be in one's interest means it's to your advantage, it's what works for you best, etc.