The simplest use of Simulink® Coverage™ is to gain insight into which parts of your model are exercised during simulation.
After you enable coverage for a model with test cases, Simulink Coverage reports on, and highlights in the model, those objects in your design that were exercised during simulation. You use the coverage reports and model highlighting to learn which parts of your model were active during the specified test cases.
Further steps include Resolving Missing Coverage and, for the most in-depth user workflow, Simulink Coverage in End-to-End Systematic Verification.