Cumulative conversion by level will also help to analyze the changes in the product. For example, earlier, 1% of users was converted to a purchase at the 20th level, but after a new release 1.5% of users began to be converted. You can’t notice such changes on the regular conversion chart by level, because it could be redistributed: before users paid more at the 3rd and 8th levels, now - at the 5th and 6th levels. Thanks to the levels at which the changes were made, cumulative conversion will let you know if more users were converted to the purchase than before the changes.