myDeployedModule.terminate() closes a package consisting of one or more deployed MATLAB^® functions. myDeployedModule.terminate() can be called on a package handle, after which no functions can be called on the handle.

If you exit from a script or session, myDeployedModule.terminate() is called automatically. Hence, calling it explicitly is optional, but a good idea because it frees resources at that point. Alternatively, you can use quit() or exit().