In section 2.1, there was discussed the characteristics of metallic nanostructures supporting LSPs influencing SERS and section 2.2 described the optical properties of MOFs that can/must be tuned in a way that maximizes the SERS performance by matching the optical gap with HOMO-LUMO levels of the analyte. Further, there is explored the additional level of complexity that arises from merging of the metallic nanostructures with MOFs, since the optical properties of such composite materials differ from those of the individual constituents.