What do italics represent?

Italics is a type of writing that slants slightly to the right like so.

It is used for several reasons:

To show emphasis:

"Well, I wasn't that tired."

Titles of works, such as books, albums and plays:

Femme Fatale

The name of a ship:

USS Idaho

Foreign Words or Words of Latin nomenclature:

I had déjà vu.

Homo Sapien.

Thought processes of characters in literature:

"What a wonderful idea." Jordyn thought.