I am brand new to Ionic and currently working through the Angular - Build Your First App tutorial. Overall, the tutorial is very helpful and I very much appreciate the work that went into this.
Coming from eyes brand new to the topic, I wanted to provide some feedback that will hopefully polish up what is already great.
On the first page in the section titled Photo Gallery!!!, I am given the following code block:
<ion-content>
<ion-fab vertical="bottom" horizontal="center" slot="fixed">
    <ion-fab-button>
      <ion-icon name="camera"></ion-icon>
    </ion-fab-button>
  </ion-fab>
</ion-content>
Keep in mind, I am brand new.  <ion-content> is a brand new concept.  So I am instructed to put FAB to the bottom of the page and I see this code.  First thought I have is “do they want me to copy and paste this block of code exactly as they have it here and paste it at the very bottom of tab2.page.html?  Or do they want me to just put the <ion-fab-button> block as the last child in the already existing <ion-content>?”  .
After some experimenting and looking at the complete code on Github, I find out that you meant the latter.
My suggestion: It would be clearer if your code examples matched what the code should look like at this step of the tutorial if the reader has followed everything correctly.
For example:
<ion-header [translucent]="true">
  <ion-toolbar>
    <ion-title> Photo Gallery </ion-title>
  </ion-toolbar>
</ion-header>
<ion-content [fullscreen]="true">
  <ion-header collapse="condense">
    <ion-toolbar>
      <ion-title size="large">Photo Gallery</ion-title>
    </ion-toolbar>
  </ion-header>
  <app-explore-container name="Tab 2 page"></app-explore-container>
  <ion-fab vertical="bottom" horizontal="center" slot="fixed">
    <ion-fab-button>
      <ion-icon name="camera"></ion-icon>
    </ion-fab-button>
  </ion-fab>
</ion-content>
or
...
<ion-content [fullscreen]="true">
  ...
  <ion-fab vertical="bottom" horizontal="center" slot="fixed">
    <ion-fab-button>
      <ion-icon name="camera"></ion-icon>
    </ion-fab-button>
  </ion-fab>
</ion-content>
Thanks for the tutorial and thanks for the opportunity to contribute in my very small way. : )