Cash advance means to take out a loan against a credit or credit card. Now these loans have a larger amount of interest but they are very easy way to get money quickly and easily. So what you do is go to an ATM or a bank and you can withdrawal money to a specific limit (every bank/company is different). You get to pay higher interest and you doing get the usual interests free months.
Now there are many pros and cons to this subject as many people have trouble paying back the money, I am included in these. They are hard to pay back because of the high interest they take to pay back.
Pros of cash advances included the fact that sometimes you may need a little bit of money to use and you will be getting a bigger amount of money later but for the moment you need quick cash.
This is a method that can give you something fast and it is very convenient, you can usually get a cash advance online or in a bank. The time depends on where you get it at but it is usually around 1-3 days.
They have a high interest which sometimes makes it hard to pay these back. Cash advance has this high interest because you are taking out money so abruptly that the bank needs to charge you more because of how fast these transactions are.
Overall you should not rely on these in any way, they have to high of an interest and I would recommend you to not use these