The metric HS Duration represents the total amount of time the GPU spent executing hull shader code.
If HS Duration is 50,000 it means that the GPU spent 50 milliseconds executing hull shader code for the selected ergs.
If HS Duration is 0, it means that either the time spent executing hull shader code was negligible, or there was no hull shader in use.
The heading in this template is a special field for topic titles, so generally you do not need to edit it.
If the HS Duration is larger than you expect, you can examine your hull shader code in the Graphics Frame Analyzer to investigate possible optimizations.