Introducing a direct quote:
* "I'm going to the store," says John.
* "The weather is beautiful today," says Sarah.
* "Don't forget to bring your keys," says Mom.
Reporting what someone said:
* John says he's going to the store.
* Sarah says the weather is beautiful today.
* Mom says we shouldn't forget our keys.
Note: "Says" can also be used to introduce a statement that is not necessarily a direct quote.
* The report says the economy is improving.
* The sign says "No Parking."
* The doctor says I need more rest.