‘Its’ and ‘it’s’ are often mistakenly used in written English. Refer to the article on contractions: ‘it’s’ is a contraction for the words ‘it is’. On the other hand, ‘its’ is a possessive noun.

The following examples will make the usage clear.

IT’S (CONTRACTION FOR ‘IT IS’)

ITS (POSSESSION)

It’s quite hot today.

The dog is wagging its tail.

It’s going to be a long day.

The baby is sleeping in its cot.

Please go back to class immediately. It’s not right to skip classes.

The table is useless now. Its legs are broken.