With soft deduplication, duplicate products aren't removed but buried. Products are deduplicated between recommendation areas within a page, by blocking products from lower-placed lists if they exist in any higher-placed list. Normally, duplicates will disappear because they are buried deep where they can't be seen, but there are cases when it’s advantageous to have duplicates:
- When a recommendation list doesn't have that many products to show, and duplicates fill slots that would otherwise be empty.
- When using a "More from the same Series" list to show all available products and avoid giving the impression that there are no more available items in the series.
- When using a "Top Products" algorithm with a custom filter, or when handpicking a few products for a landing page listing, to make sure that the whole selection is displayed.
The following lists are not affected by deduplication:
- STYLE_WITH
- RECENTLY_VIEWED
- NEWEST_PRODUCTS
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