Loans can broadly be divided into two categories: secured and unsecured. With a secured loan, the lender will insist on some sort of security against the money you borrow, often a house or car. If you default on the payments, the bank or building society can then sell the asset to clear the debt.
You can usually borrow large amounts with a secured loan, and at a lower rate of interest. Plus, you can pay back the debt over a long time period, perhaps 10 or 15 years.
However, secured loans are more risky than unsecured loans because you could lose your collateral if you cannot clear the debt. You should therefore think very carefully - and consider other options - before taking out a secured loan.