Question about exporting clusters

What is the purpose of having an "Export clusters" button? or how to reuse the exported clusters?

I tried to use the exported Json file by in the "apply" option in the "Undo/Redo" tab, but it didn't work.
Also checked the docs, but found nothing.

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I guess you could use this information in external tools, or even import the JSON file in OpenRefine by creating a new project out of it. Similarly to the way we let users export facet statistics as a TSV file (which is similarly clunky), it can enable some more advanced workflows I guess. For instance, if the clustering UI isn't good enough to review a lot of clusters, you could want to open that as a separate project to run more advanced checks on the clusters and figure out which ones to merge. The result could be merged back in the original project by means of the cross() GREL function, for instance.

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Expanding on @antonin_d's answer, exporting the cluster lets you distribute the review to more than one user outside OpenRefine. This is particularly useful if you have hundreds of suggestions to review.

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