Object.freeze() is used to make all properties non-configurable and non-writable while keeping their enumerability: 1) It prevents adding new properties, 2) It prevents removing or reconfiguring existing properties, 3) It makes all data properties non-writable, 4) It doesn't change the enumerable status of properties, 5) It creates the most restrictive form of object immutability in JavaScript, 6) It's a shallow operation, affecting only direct properties of the object, not nested objects, 7) It's commonly used for configuration objects, constants, and preventing accidental modifications.