Why should I use it is instead of its in formal writing?

You should never use "it is" instead of "its" in formal writing.

* "It is" is a contraction of "it is," and it's used to show possession (belonging to something).

* "Its" is the possessive pronoun of "it."

Here's why it's important to use the correct word:

* Clarity: Using "it is" instead of "its" creates ambiguity and makes your writing confusing.

* Grammar: "It is" is not grammatically correct when referring to possession.

* Professionalism: Using incorrect grammar in formal writing can make you appear unprofessional and careless.

Examples:

* Correct: The dog wagged its tail.

* Incorrect: The dog wagged it is tail.

* Correct: The company announced its new product.

* Incorrect: The company announced it is new product.

Always double-check your writing to ensure you are using the correct form of the possessive pronoun.