This thesis investigates young stellar clusters and their associated molecular clouds. It concentrates on four target regions, using observations from the 3.6m DOT, 1.3m DFOT, GMRT, and 2m HCT, complemented by multiple archival datasets. The first project presents a detailed, multi-wavelength study of the Galactic MIR bubble [HKS2019] E70, demonstrating how feedback from a massive star influences and shapes the bubble. The second project explores the overall star formation picture in the star-forming regions AFGL 5157, [FSR2007] 0807, [HKS2019] E70, [KPS2012] MWSC 0620, and RAS 05331+3115, located in the outer Galactic arm. The results indicate that this complex contains a diverse collection of star-forming sites, where stars are born through multiple mechanisms. The third project carries out an in-depth, multi-wavelength examination of the expanding Galactic MIR bubble [HKS2019] E71. The fourth project focuses on the open cluster Kronberger 55, situated at a distance of ~3.5 kpc. The analysis suggests that this region is probably a hub–filament system undergoing active star formation, in line with the ‘end-dominated collapse scenario.’ Collectively, this thesis makes a substantial contribution to our understanding of star formation processes.