Filtering segments allows you to filter your NPS by any of the attributes/extra columns you’ve uploaded with your contacts. Find out if your NPS score is better among customers on different plans, regions, etc.
Attributes have a "unique value" limit
Attributes that have more than 100 unique values associated to them will not be available as a choice to filter by.
Attributes you’ve uploaded overall can be seen by visiting your Dashboard and clicking on Add Filter in the upper left above your graph.
A pop-up will appear with a list of all your attributes. Select an attribute and click Next.
In the next section, select the value you'd like to filter by.
Once you add the filter, you'll see your dashboard update and the filter applied in the upper left above the graph.