A secured debt is linked to a specific item of property, called collateral, that guarantees payment of the debt. If you don't pay, the creditor is entitled to take the collateral.
Common examples are automobiles and mortgages.
There are two kinds of secured debts, consensual and nonconsenual. Consensual secured debts are based upon your agreement to collateralize the debt with property. Again, the best examples are car notes with a lien on the car and mortgages with a lien upon a home. Other examples include, home equity loans, loans for boats, tractors, motorcycles or RVs, and some store charges. A creditor can, in some circumstances, get a lien on your property without your consent.