LAMMPS (Large-scale Atomic/Molecular Massively Parallel Simulator) is a powerful, highly efficient, and flexible platform for particle-based simulations widely used across soft matter physics. This talk offers an accessible introduction to how LAMMPS can be used to explore systems such as polymers, colloids, and coarse-grained models of proteins. Through selected examples, we will highlight how simplified approaches can capture rich collective behavior and provide insight into structure, dynamics, and self-organization in soft materials.