Would you like to know the “#1 Grammar Error”?
Hint: The word involved is small and it’s contained in this sentence.
That’s right: its vs. it’s
Yet the two rules are actually quite easy to remember.
Rule 1: When you mean it is or it has, use an apostrophe.
Examples:
It’s a nice day.
It’s your right to refuse the invitation.
It’s been great getting to know you.
Rule 2: When you are using its as a possessive, don’t use the apostrophe.
another example of american laziness
http://data.grammarbook.com/blog/pronouns/1-grammar-error/