Unsecured line of credit: An unsecured line of credit is one, which does not require any liability or equity to be put up as security for the loan. These types of loans often have higher interest rates, as there is more risk for the bank or lender who is giving you the money. These loans are smaller amounts of money with less time to repay them.
An business line of credit for a credit card is when you have a certain amount of money that you can borrow on your credit card. There is a cap on this, for example $600 and you cannot borrow more than this. However, you can take a couple of smaller loans as long as they do not add up to be more than your limit.
Business loans are quick and convenient and can be used for most emergencies. They are also useful for establishing and reestablishing credit lines and improving your credit score. Once you do this you can borrow more and get a more flexible loans. These are good loans to have and because of their small amount they are easier to pay back.
You can check with your credit card company whether you are eligible for an unsecured line of credit against your card. It is always a useful thing to have, as you never know when an emergency will come up.