Option 1 - Adding Globally - CSS will be present on entire website
Go to Theme Editor
Click the left Cog Icon Theme Settings
Scroll down in the left column to Custom CSS
Add the above Custom CSS
Click Save
If you do the above option you don’t need to do below Option 2.
Option 2 - Adding to each occurrence of Collection Product Grid Block
Go to Theme Editor
In the top middle right drop-down select Collections
Select Default collection
In the left column Find and Select the Collection Product Grid
In the right column Scroll Down until you see Custom CSS
Add the above Custom CSS
Click Save
Looks like you have the Collection Product Grid Block setup on the Home Page so you will need to do this for each occurrence of the Collection Product Grid Block in each Template for example…
Go to Theme Editor
In the top middle right drop-down select Home Page
In the left column Find and Select the Collection Product Grid
In the right column Scroll Down until you see Custom CSS
That worked! Thank you. Is there any way to get the rollover image to appear quicker? Right now it has a pretty long delay to go to the next image. Thank you.