What is mewing supposed to do?

[Lebgfinal]

I'm 17 and I never mewed but I'm really wondering what difference is it supposed to do? Every mewing transformation I saw was basically just fat loss + puberty. What does it claim to do? Make your chin bigger? Make your jaw more defined? Everyone seems to have different definitions.

 

[ㅤ$ㅤ ㅤ]

puberty.

puberty without mewing will make you look worse retard incel

 

[Lebgfinal]

puberty without mewing will make you look worse retard incel

Is mewing just not mouthbreathing?

 

[Deleted member 9467]

mewing is just posture but for the tongue