There are two types of quotation marks:
* Double quotation marks (" "): Used for direct quotes in most English-speaking countries.
* Single quotation marks (' '): Used for direct quotes in some English-speaking countries (mainly the UK and Australia) and are also used within double quotes for quotations within quotations.
Here's an example:
"I'm going to the store," said Sarah. "Do you need anything?"
This shows that the exact words spoken by Sarah are "I'm going to the store" and "Do you need anything?".