Most people only associate money with the word loans. It is possible that you can receive loans for many things other than money, but monetary loans are the most common type of loans.
There are also many types of loans with many different terms and durations as well as ways to pay them back.
A loan backed by collateral is called a secure loan. A secured type of loan is usually given when purchasing a car or a home. In this type of loan, if you do not pay the loan back within the specified guidelines, the item that you purchased with the loan can be taken from you by the entity that has loaned you the money.
You may also obtain a secured loan by offering a house or a car that you have purchased as a type of insurance that you will pay the loan back. Once again, if the loan is not paid back within the guidelines your home or car can be taken by the entity that loans the money. They will then sell the home or car to pay back your loan.
The opposite of this is the unsecured loan. This type of loan carries more risk for a lender so the amounts loaned are usually smaller than what would be given with a secure loan. Most people obtain a credit card and this is a type of an unsecured loan. If the balance on a credit card is not paid there is no collateral that can be confiscated to pay back this balance. However, no matter what type of loan that you decide to receive or give it is imperative that you note the details of repayment, as this will vary with every individual loan.