How to adjust the sale tag design

Also Bought will display a sale badge over an image when the product is on sale if the Sale tag option is enabled.

Just go to the Visual styles section of the app's preferences:

You can enable the sale tag inside the 'Product sale tag', in the Visual preferences:

You can change the sale tag text or translate it to another language if required. For example, if you write SALE you will see it like this:

Of course, you can change the text colour and the background colour:

In this case, the sale tag will now look like this:

You can also customize the styles of the sale tag by adding CSS styles here in JSON format:

Lastly, please remember to click on "Save" at the top right corner of the preferences page so that the changes can be successfully applied.