Just explain what you know about gravatar?

Globally Recognized Avatar is referred to as Gravatar. Because millions of people and websites utilise them, they are well-known throughout the world. The majority of well-known programmes, including WordPress, already include Gravatar functionality.

A globally recognisable avatar is a gravatar. When you join in any website that supports Gravatar, your Gravatar picture and public profile will immediately follow you there after you submit an image and create your public profile. Site owners, programmers, and users can all use Gravatar for free.