means what

this kind of debt includes medical bills,credit cards etc... The lender gives loan without security that an underlying asset provides.Moreover this kind of debt carries high risk thus making this kind of loan more expensive than others

think if it this way, secured debt is secured by your stuff. like a mortage, or car if you dont pay your bill they come get it. unsecured is were there is no collatoral. like cc's or medical bills if you dont pay these they cant come take your stuff. unsecured is any type of debt were you have nothing put up for collatoral. If you dont pay it they cant come get your things