iCloud
Change your Apple ID password
Your password protects the privacy of your information stored in iCloud. You should regularly change your password to protect your information.
Sign in to your Apple ID account page and follow the instructions to reset your password. For detailed instructions, see the Apple Support article Change your Apple ID password.
The next time you use Apple features and services that require an Apple ID, you are asked to sign in with your new Apple ID password. See the Apple Support article Where can I use my Apple ID?