Money Bag emoji is the picture of a cloth sack, which is obviously full of money (the dollar symbol on it transparently hints to it). Also, there may be additional banknotes or coins around it for even more obvious meaning. The emoji, just like 💸 Money With Wings emoji and other money-related ones, is used in the context of wealth and luxury. It may also symbolize banks.
Examples of using
“He is so rich, I can’t believe it 💰”
“Hope I’ll have this much money one day 💰”
How to type
Say it with ASCII