The Net Sentiment Score (NSS) works in the same way as Net Promoter Score (NPS).

The difference is that NPS is calculated from a 'Recommend' score, while NSS is calculated from the sentiment found in opinions in text.

Your NSS = % of positive opinions minus % of negative opinions

For example, if there 60% of opinions are positive 40% of opinions are negative, then your NSS is 20.

You can report on this in the NSS heat map.