Object Descriptors & Property Flags

The 'writable' property flag controls whether a property's value can be changed after initial assignment. When set to false: 1) Any attempts to change the property's value will be silently ignored in non-strict mode, 2) In strict mode, attempts to change the value will throw a TypeError, 3) The property becomes effectively read-only, 4) It doesn't prevent deletion of the property, only value reassignment, 5) It provides a way to create constant properties, 6) It's often used with Object.defineProperty() to create properties with controlled behavior.