What difference will DeepMocked make while testing using jest

Question

I am writing unit tests using jest and npm package @golevelup/ts-jest in my nestjs project.

describe("EventHandler", () => {
  let shopService: DeepMocked<ShopService>;
  beforeEach(async () => {
    const module: TestingModule = await Test.createTestingModule({
      providers: [
        ,
        {
          provide: "SHOP_SERVICE",
          useValue: createMock<ShopService>(),
        },
      ],
    }).compile();
    
    
    shopService = module.get("SHOP_SERVICE");
  });

I want to know what difference does it make if i don't use DeepMocked and instead write like this:

describe("EventHandler", () => {
  let shopService: ShopService;   **---changed here**
  beforeEach(async () => {
    const module: TestingModule = await Test.createTestingModule({
      providers: [
        ,
        {
          provide: "SHOP_SERVICE",
          useValue: createMock<ShopService>(),
        },
      ],
    }).compile();
    
    
    shopService = module.get<ShopService>("SHOP_SERVICE");  **---changed here**
  });