工具及方法 - 利用在线网站Gravatar创建你的个人Profile
Gravatar是一个永久免费的网站，不收取任何人的费用。它为个人提供公开的头像和介绍信息，并以供整个网络访问。你的信息和邮箱绑定，Gravatar提供了根据此邮箱即可访问你信息的服务。
这样不管你登录到哪个网站来发表评论或进行互动，都可以使用Gravatar网站的接口来提供一个统一的个人信息，而不用在每个网站都设置你的账户信息。
Gravatar是Globally Recognized Avatar的缩写。WordPress.com天生支持并内置了Gravatar，还有我使用SmartGit工具时，发现它也支持。
Gravatar此网站由公司Automatiic来运行并支持，和支持WordPress.com的公司是同一个。不仅WordPress.com，还有很多其他网站或服务使用了Gravatar。
如何使用Gravatar？
https://en.gravatar.com/
https://gravatar.com/
登录上面地址网站，然后用你的邮箱注册一个账号，也可以用WordPress账号来登录。
账号成功登录后，找一张你喜欢图片，上传，作为你的头像图标进行显示。上传图片时，可以进行缩放和裁剪。
在上传时，可以设置自己头像的级别，分为G、PG、R或X。 G类别表示适合所有观众，X表示仅适合成人观看。
G is suitable for display on all websites with any audience type.
PG may contain rude gestures, provocatively dressed individuals, the lesser swear words, or mild violence.
R may contain such things as harsh profanity, intense violence, nudity, or hard drug use.
X may contain hardcore sexual imagery or extremely disturbing violence.
在设置完头像图标后，也可以设置一些个人描述信息。
在使用邮箱注册后，还可以添加邮箱，意味着Gravatar的信息可以绑定多个邮件地址来进行访问。
如何检查你的Gravatar账户的头像图标？
打开下面网站，输入你的邮箱即可：
https://en.gravatar.com/site/check/
=== 分割线 ===
其他说明：
Gravatar is free for everyone—forever.
Gravatar powers your public profile, visible wherever you post, comment, and interact online.
One avatar for everything, everywhere.
Set once, seen everywhere.
Create, upload, and manage your globally recognized avatar from a single place.
More than just an image.
Instantly tell the web who you are and where people can find you. Gravatar can display links, photos, contact info, wallet addresses, and other details.
Trusted by top brands.
The biggest companies you know use Gravatar. Your avatar is automatically recognized by Slack, GitHub, WordPress, and other popular services.
Public, open, and responsible.
Your avatar is linked to a public email address. You choose what to display on Gravatar-enabled sites: what you share on your profile is open to the world.
As always, your data is yours.
An "avatar" is an image that represents you online—a little picture that appears next to your name when you interact with websites.
A Gravatar is a Globally Recognized Avatar. You upload an image and create your public profile just once, and then when you participate in any Gravatar-enabled site, your Gravatar image and public profile will automatically follow you there.
Gravatar is a free service for site owners, developers, and users. It is automatically included in every WordPress.com account and is run and supported by Automatiic.
使用举例：
使用SmartGit时，显示Gravatar的图标：
使用Bitbucket时，会根据邮件地址自动显示Gravatar的图标。
同时在账户管理中，也可以使用自定义头像，如果不设置自定义头像，就会使用Gravatar的图标。
参考：
1，https://en.gravatar.com/support/what-is-gravatar/
2，What Is Gravatar? Complete Guide for WordPress Users + Everyone Else