A singular possessive noun shows that something belongs to one person or thing.
We add an apostrophe ' and s to most singular nouns to show that it belongs to someone or something.
Keisha's yellow kite flies nicely in the sky.
The yellow kite belongs to Keisha.
The puppy's tail wags when he is happy.
The tail belongs to the puppy.
The table's leg was loose.
The leg belongs to the table.
A plural possessive noun shows that something belongs to more than one person or thing. We add just an apostrophe (') to the end of a plural noun.
The squirrels' nest is in the tree.
The nest belongs to the squirrels.
I am going to my grandparents' house this weekend.
The house belongs to the grandparents.
The ripe strawberries' smell was sweet.
The smell belongs to the strawberries.