A person's "email address" is what you type in the "To:" field when sending someone an email. For example, the email address for PhraseMix support is "[email protected]".
You can also call someone's email address their "email" in casual speech:
Hey, what's your email?
But this can be confusing sometimes since your "email" can also mean:
- your email inbox
- an email message
So use "email address" if you want to be really clear what you mean.