Gravatar is a service that provide unique globally avatars and integrated it into their WordPress.com blogging platform. If you don't have avatar image then you can get Gravatar src image from thier email if it register on WordPress.com. So if you want to implement in your laravel application then it is very easy. There are several package for Gravatar image for laravel, but we will use thomaswelton/laravel-gravatar package that is i think better.
First fire following command on your terminal.
<pre>composer require thomaswelton/laravel-gravatar</pre>