Creative clustering is a technology developed by Singular to group images that are very similar but not identical.
Enable creative clustering in your report if you have a bunch of similar assets with tiny differences, such as images with a different background color, and you want to evaluate their performance as a group.
Disable creative clustering if you have similar assets with small differences but you want to compare their performance against each other.
Creative clustering applies to image content only. Grouping by text always relies on exact matching.
The creative clustering option is not available if you group by Text (or by both Image and Text).
Selecting certain dimensions in your query will break the clustering. For example, if you select the Creative Name dimension in your query, the report will ungroup any images that are similar but do not share the same creative name.