About how to set tangent of a mesh

I am trying to set the tangent of the mesh inside the Unreal Material Editor when I saw this TangentOutput node. But after a few try, I still have no idea how to use it. I tried to look it up in Unreal documentation, but found nothing.

I believe that there is a pattern between how normal map reacts to light and tangent of the vertex on a mesh, so it will be quite beneficial if I could somehow change the tangent direction of the vertex on the mesh.

It will definitely be great if anyone could see and perhaps response to this topic.