Confused? Some common sense rules make it much easier to make the right choice.
Rule #1: Never use
its’. You will probably never have occasion to use such a word and it would be best to strike it from your vocabulary.
It's is a contraction and short for
it is or sometimes for
it has.
Its is a possessive pronoun and means something like
that which belongs to it, where
it stands for an object that has been previously defined.
Rule #2: If you can replace the word with “it is” or “it has”, use
it's. Otherwise, it's always
its.
A handy example of these rules from
The Craig Web Experience: It's "Its"! is:
Example: “Nothing can take
it's place” can't be right, because “Nothing can take
it is place” is nonsense. You probably mean “Nothing can take
its place”.
Example: “
It's not easy being green”. Well, “
It is not easy” is right, so the original sentence is okay.
Hope that helps!