Samsung devices will allow you to view your passwords as you enter them into a password field. This is useful if you are having issues logging in and want to check that the password you are entering, or the password that is saved, is the correct one.
If you don't want your passwords to be hidden behind asterisks, upon typing them:
- On the Home screen go to > Applications > Settings > Location and Security
- Scroll to the "Passwords" section
- Check "Show password as you type"