Quick Add is a feature of the (BU) Add To Cart element. The users can add the variable product directly to the cart from the home, shop, archive, etc pages(without going to the single product page). So it will reduce the one step for the users.

Make sure that you activate the Swatches feature at the Bricks-> BricksUltimate -> MISC tab and add the (BU) Add To Cart element inside the loop builder wrapper. Then you should do the following things:

1. Enable the Using inside the query loop builder? option
2. Go to the Quick Add section
3. Turn on the “Enable quick add action” option
4. Add the other settings as per your need
5. Select the query loop builder container and set the position “relative” in the Style tab
6. Adjust the other settings as per your need

Now go to the frontend and click on the “Select Options” button. It will load the add-to-cart form via AJAX. Now select the attributes of the product and click on the “Add To Cart” button. The product will be added to the cart directly.

Preview