What does 'learns her place' means? Picture included!!?

In this phrase, 'place' refers to status, class and role in society. One who 'learns her place' or even 'learns his place' is someone who has behaved in ways above their station in life and has been criticized and punished for his or her presumed arrogance.

So yes, it can be taken in this instance as a sexist remark, implying that because Cinderella is female, she had no business leaving the kitchen. However, it's really more about class, as the evil step-sisters were clearly allowed much greater social freedom and commanded more respect because they had a family fortune, but Cinderella was penniless.

So to 'learn one's place' is very similar to being 'knocked down a peg': in both cases, someone has been assuming rights and freedoms that others felt were out of line for their social class or experience, and has been punished for doing so until they accept their social role.

It's a sexist joke. It's saying that if you watch Cinderella you will see a woman her learns her place because you will see Cinderella go from a princess back to a poor girl. Learning ones place means knowing where you belong. The caption is saying that a woman belongs as a house worker, cleaning toilets and making food. It is very sexist.