The ‘All Mail’ folder in Gmail is where Gmail keeps all of its emails and labels are applied to show emails in various folders including the Inbox. So the ‘All Mail’ label is really an archive folder in Gmail.

You can access All Mail label by clicking on All Mail on the left side of your Gmail:

On the other hand, only non-archived incoming emails are in Gmail Inbox. Thus, the following emails are not included in Gmail Inbox:

  1. Sent emails
  2. Archived emails
  3. Promotial emails
  4. Social emails
  5. Forum emails
  6. Chats
NOTE: If you want to know why does “All Mail” not show up at the left of Gmail screen, please check the following support note: Why does “All Mail” not show up at the left of my Gmail screen?.