How to Create a Container Game object in Unity 3d

Hello everyine I am stuck at 3d Platform tutorial bY UNITY 3D. I am on page 39 last part and stuck on last three lines which say-

The main problem is this sentence The next step is to create a container GameObject

     Rename this RespawnPoints 

     Make all the respawn prefab instances children of RespawnPoints. 

So I don't know how to create a Container game object. Please help. Thanks.

A container gameobject is a gameobject with children :)

you just make a gameobject and drag the other gameobjects on top of it.