The score column
How similar this row is to the record it was grouped with, on a 0 to 1 scale. It is filled in by a matching run — a freshly imported table shows - for every row, because nothing has been compared yet.
The number only means something next to a threshold:
- at or above Match threshold the pair is treated as a match;
- just below it, the row is a likely false negative: a real duplicate the run left out. Lowering the threshold a little is what brings those back;
- far below it and still grouped, the pair is a likely false positive.
Rows that matched nothing keep their own row and no score.
