1. Go to your blog and click the Customize button that shows up in the corner.customize.PNG
  2. Once there, click on Widgets and select the ‘Sidebar’. widgets.PNG
  3. Scroll down to the bottom of the widgets and click ‘Add New Widget’. Click the ‘Category Cloud’ one. Not the Categories, that will just have a drop-down. category cloud.PNG
  4. Customize it like you want and then click save and publish! 😀