Using it we can create better and more cohesive Domain Model.
Embeddable let’s you aggregate some properties, that are linked together in some way, into one cohesive class. You may say — well, I can create another entity and create a relation, what is the difference?
Only the properties that had to be mutated in some way will point to another object somewhere else in memory.
If you will need to implement identity in some class in other way, you will just not extend this one.