An apostrophe can be used to show who or what is the owner of something.

If the owner is singular (only one) put an apostrophe and then add an “s” e.g. Tom’s cat = the cat belonging Tom.

If the owner is plural (more than one) and ends in “s” put an apostrophe after the “s” e.g. The cats’ home =  the home belonging to more than one cat

If the plural does not end in “s” put an apostrophe and then add “s”

e.g. The children’s games = the games belonging to more than one child

If a name ends in “s” and is more than one syllable just put an apostrophe after the name, e.g. Moses’ basket