If you are using Classiera 2.0 + Version then Watch this Video.
Go to WordPress Dashboard --> Classiera Options --> Layout Manager --> Layout utilities --> Here you will see option for font awesome or image icon.
After to select and save settings please go to All Posts --> Categories --> Edit any category and you will see option for .
1- Font Awesome icon : Leave empty if you want to use.
2- Category Image : Upload image here.
3- Select Color from color picker.
4- Map/Image : Upload your Icon here.
Update category, That's All
You can get Icons code from these links.
http://zavoloklom.github.io/material-design-iconic-font/icons.html
If you are using Old(Classic) Version then follow these steps.
1- Please login to Your WordPress Dashboard
2- Come to All Posts --> Categories --> From Here Edit any Category or Add New Category .
3- Here you will see "Icon Code" Input box, Put Icon code like "fa fa-car" and you can get this code from.
https://fortawesome.github.io/Font-Awesome/icons/
4-Then Come to "Icon Background Color" From here you need to select color for this icon.
5- Then come to "Map Pin" You need to select MAP Pin icon for this category , We have include some icons image in our dummy content folder .
At the Last Please click on "Add New Category" if you are adding new or you will see update button.
Thanks