Please what does it mean when someone says "you don't look your age" is it a compliment or an insult?

It depends. Could be a compliment and could also be an insult. It's either you look older than your age or you look younger than your age.

I can only tell you what the person means specifically, if you tell me your age and show me your current picture

pp802:
It depends. Could be a compliment and could also be an insult. It's either you look older than your age or you look younger than your age.

I can only tell you what the person means specifically, if you tell me your age and show me your current pucture

You nailed it bro

It cn b refered 2 as an insult, in d sense dat, d person tells u dt ur bhaviour z nt matured enough or simply because u tlk lik a child wen u ar abv dat measure. Or as a compliment wen u do tinx dt ar byond ur age dt z, u tlk lik a matured person while u ar stil young.

ANDJMBOY:
It cn b refered 2 as an insult, in d sense dat, d person tells u dt ur bhaviour z nt matured enough or simply because u tlk lik a child wen u ar abv dat measure. Or as a compliment wen u do tinx dt ar byond ur age dt z, u tlk lik a matured person while u ar stil young.

I think there's a difference between, you don't "look" your age, and you don't "act" your age.