You might have noticed the new strange refSrc parameter in your URLs, whenever you click on a product in a Nosto recommendation slot. Are you wondering what that might be?
The param `refSrc` defines the identifier of the product that was clicked in the recommendation.
For example, if you have a recommendation slot of the page, identified as
nosto-slot-product1, and customer clicks a product, within the slot, with the identifer
pid1, the visitor will be redirected to a page and will see the following query parameters appended to his URL
This is used to the clicks on products from recommendations so Nosto's AI Engine can optimise for products that have high-CTRs and can also be used for filtering our products with low CTRs.
If you still have questions on this, please reach out to Nosto support :)