Securitization is like putting your stuff in a container. If you have things like loans or mortgages, you can put them into a container and then sell that container to someone else. That makes it easier to borrow money from banks or investors because it means they don't have to keep track of all your stuff. So instead of one person collecting payments for lots of loans or mortgages, you can have lots of investors who each have a piece of the container and can collect payments from different people. That way, the investors don't have to worry about all the details, and they still get their money back.