Repeat password field necessary in a signup page? [duplicate]

1. Why do users need to provide their password twice?
2. Should you have a confirm password field?
3. What is retype password?
4. What is password field match?

Why do users need to provide their password twice?

It is to avoid typos. If you have to type the password twice chances are you'll make your password what you want. They want to avoid having people whose password is "blah" having to retrieve their password later on because they typed "blaj" by mistake.

Should you have a confirm password field?

While the confirm password field seems sensible, including it can lower your conversion rate. A research study found that the confirm password field was responsible for over a quarter of all users that abandoned their sign up form.

What is retype password?

To ensure that you've correctly entered your desired password, you must enter it a second time in this field. To confirm the password, enter in the Retype New Password field the same password you entered in the Password field.

What is password field match?

It is used in online application form or social sites to signup account to verify the entered password by user is correct or not. It is the simple method to verify the password matches. First password is stored into a password1 variable and confirm password is stored in password2 variable.