How to add / remove a certification filter to search results?

while in business account profile

To ADD:

1. From the main drop-down select my certifications
2. Select the Search for a Certification box
3. Search for your certification, then select it so it is highlighted
4. Select Add button to add your certification

To DELETE:

1. From the main drop-down select my certifications
2. Select the delete certification action icon (x) to the right of your certification to remove it from your profile