Is empty set is a part/subset of some/any set from the point of view of set theory?

Question

Is empty set is a part/subset of some/any set from the point of view of set theory?

Answer 1

Yes, an empty set is considered a subset of other sets.

A particular example is that a powerset (the set of all subsets) always includes the empty set.

Per Wikipedia:

In mathematics, the power set (or powerset) of a set S is the set of all subsets of S, including the empty set and S itself.