Email verification link vs code

1. How do I create an email verification link?
2. How do I verify my email with verification code?
3. How do I write an email verification code?

How do I create an email verification link?

Generate email verification link

To generate an email verification link, provide the existing user's unverified email and an optional ActionCodeSettings object. The operation will resolve with the email action link. The email used must belong to an existing user.

How do I verify my email with verification code?

Sign in to your email to verify your account

Open the email and find the verification code. To finish creating your account, enter the verification code when prompted.

How do I write an email verification code?

A verification email should be very short and straight to the point. They should only be three to four lines of text. Inform the user what they need to do to proceed with the creation of their customer portal account. Use simple language.