You can change your password for security reasons or reset it if you forget it. Your Google Account password is used to access many Google products, like...

See the impact of your profile and collections, including: How many people
followed your profile How many people followed your collections How many
times ...

You can use a custom URL to create a short, memorable web address for your
Google+ profile. Important: You can change your custom URL up to 3 times a
year ...