This gives you an option to facilitate making statistics for partners (statistic partners) and sub-partners (cooperation partners) Maybe you have a Statistic Partner called "Sport". Its a national Organization. Then each sport club under this partner, also want to know their collection results. Then you can enter them as a Cooperation Partner. In the video below, i will go through an example
This is also a good feeature to use if you have partners in collecting as well, as you can put them on as a Statistic Partner and then you can run statistic only for containers they collect