It's vs. Its

It is the third person singular pronoun. We use it to talk about things that are not people.

It’s is the contracted form of ‘it is’ or ‘it has’. If you can replace it’s for ‘it is’ or ‘it has’, then please use it’s in your sentence.
Example:
It is a beautiful day. It’s a beautiful day.
It has been a long time since we last talked. It’s been a long time since we last talked.

Its is a pronoun used to represent what an object possesses. We use this to show that one thing owns another thing. Its comes before the noun in a sentence.
Example:
The tires on the car are flat. Its tires are flat.

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