I keep coming across the term what is collateral in finance, especially when learning about loans, mortgages, and lines of credit, but I’m still not totally clear on how it works. From what I understand, collateral is something valuable you offer to a lender as security in case you can’t repay the loan — like a car, property, or even investments. But does the lender own the collateral while the loan is active, or only if you default? And does offering collateral actually help you get a lower interest rate or bigger loan amount?