What is the importance of $2d$ supersymmetric gauge theory?

Question

I have been working $2d$ $N=(2,2)$ theories focused on checking duality like, Seiberg duality (2d version: named "Hori-Tong" duality) and its extension.

During the study i got $2d$ $N=(2,2)$ theories are related with Mirror symmetry ($2d$ $N=(2,2)$ Gauged Linear Sigma model plays an important role) and topological field theories.

I want to know what is the importance of $2d$ supersymmetric gauge theories.

This post imported from StackExchange Physics at 2015-10-06 15:49 (UTC), posted by SE-user phy_math