Meaning of “she's” - Learner’s Dictionary

she's

us uk /ʃiːz/
At present she's working abroad.She runs every day so she's in pretty good shape.The kids are naughty because she's too soft on them.I'd avoid her if I were you - she's in a foul temper.We don't know for certain whether she's coming.
SHE IS

short for she is:

She's a very good student.
SHE HAS

short for she has:

She's been working very hard.

(Definition of “she's” from the Cambridge Learner’s Dictionary © Cambridge University Press)