Core TSIs : Knowledge Base : Knowledge Base – Field Descriptions
Knowledge Base – Field Descriptions
Knowledge base categories
Field
Description
Description
Enter the name of the knowledge base category.
Image
Upload relevant images which will be used by the Knowledge Base module in Self-Service to display images on the search page.
Image URL
Enter a URL to an image. Knowledge Base module uses this URL to display images on the knowledge base search page.
* 
The feature switch Enable image field for Self-Service Knowledge base categories when enabled, will pick the images from Image field, else from the Image URL field.