Its or It's?

It’s and its are not the same thing. While "its" is the possessive form of the pronoun "it," "it’s" (with an apostrophe) is a contraction of "it is." If you’re unsure which one to use, try the phrase with "it is," — if it still makes sense, use "it’s," the contraction and not the possessive pronoun.

The company and its mission are admirable. (Whose mission? The company’s mission.)
I went to the Louvre today. The Mona Lisa is among its most famous paintings. (Whose painting? The Louvre’s painting.)
It’s ten o’clock. (It is ten o’clock.)
When it’s cold out I always bring gloves with me. (When it is cold out…)