Its vs It's

Two tiny words, and many English speakers don't use them correctly. Maybe they're on drugs. Surprisingly, the one WITHOUT an apostrophe (') is the possessive of it — because it's a possessive pronoun (like his or hers, which have no apostrophe). The other is a contraction of “it is.”

• ITS — belongs to it. The robot polished its sunglasses.
• IT'S — short for “it is” or “it has.” It's snowing.

Quick tip: the apostrophe in it's stands for a missing letter. If you can say “it is” or “it has,” write it's. Otherwise its.