Action icons will have be rounded icons with a nice round background, the normal action icons will have the theme color as the Text Color and have a nice hover effect. An alternate type of action icon is also available which will allow you to change the background color and the text color, however it will not have the hover effect. Action icons have 6 different sizes, check them out below
Action Icons Alternate:
The alternate action icon lets you choose any background color and the text color, become creative an choose your own colors!
You can also insert icons inline anywhere in your content