Amazon created a help page on it and forgot the most important thing, where is it?
ETA
I have not been invited to this beta
ETA 2
Why do I not see my customer service rating?
Only Selling Partners who have received 40 responses from buyers within the last 4 weeks on “Did this solve your problem?” feedback survey listed on all seller responses emails will see a Customer Service Rating to ensure that the calculated rating is meaningful.
Each week we will re-evaluate whether you have received enough responses to calculate your rating.