When you're building an application, you want to be able to find the best possible components to use. After all, why reinvent the wheel when you can use something that's already been created and is known to work well? That's where a marketplace comes in.
在构建应用程序时，您希望能够找到最适合使用的组件。毕竟，当您可以使用已经创建并且众所周知可以正常工作的东西时，为什么要重新发明轮子呢？这就是市场进来的地方。