Potential form of 'morau' — to be able to receive; can get or obtain something.
この仕事で給料がもらえるのはありがたい。
I'm grateful that I can get paid for this job.
明日プレゼントがもらえるかもしれない。
I might be able to receive a present tomorrow.
図書館でその本を無料でもらえる。
You can get that book for free at the library.
Auxiliary/request use after the -te form: a polite/colloquial way to ask someone to do something for you (e.g., 'Could you do ~ for me?').
ちょっと荷物を持ってもらえますか？
Could you carry my luggage for a moment?
写真を撮ってもらえない？
Could you take a photo (for me)?
この書類、チェックしてもらえますか。
Could you check this document for me?