Jets, the collimated bunch of particles originating from quarks and gluons, are among the most interesting and complex objects studied at colliders. With a good understanding of jets, we can use them as a tool to explore both Standard Model (SM) and Beyond Standard Model (BSM) physics. There are two distinct ways of treating jets to understand the associated physics: either treating them as unified objects and examining their kinematics, or by delving into their internal constituent-level structures, known as jet substructures. The first part of the talk focuses on jet substructure-based studies, where ongoing efforts relate to: 1) Calibrating jets, resulting in improvements to the jet energy scale used by the ATLAS collaboration; and 2) Understanding the quantum chromodynamics behind jet formation and jet tagging possibility at the Future Circular Collider using the Lund Jet Plane. The second part centers on BSM resonant searches in the 𝑏𝑏𝛾𝛾 final state, where jets are treated as unified objects. The search reports an excess observed by the CMS collaboration with local (global) significance of 3.8 (2.8) standard deviations.
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