Perverse sheaves and Springer theory

Perverse sheaves, a topological tool like classical cohomology theory, has been one of the most powerful tools in representation theory almost immediately after its invention by Goresky, MacPherson, Deligne, and others. In this talk we hope to give some motivations how this happens, and try to give some examples in the so-called Springer theory related to representations of groups like $GL_n(\mathbb{F}_p)$ and $Sp_{2n}(\mathbb{F}_p)$.