Sometimes email subjects don't make any sense. Use labels to change them.
When a new email is received, it will appear in the Inbox as a new conversation with a label that is set to its subject. You can rename the label so that it appears in Inbox with a different subject.
The original subject of the email is not lost so your contact will still get a reply with the same subject.
To re-label the conversation:
- Click on the item's subject in Inbox to bring up the conversation panel.
- Click on the ellipsis button and click on "Re-label" option.
- Set the new label and click on save.
- Refresh the Inbox to see the new label. Any new replies will also appear with this label as a group even though the subject of the email stays the same.