For one user primary email, you can now create a signature for your alias email such as firstname.lastname@example.org
To be able to switch signatures from the same email based on the audience you are talking to. For example, you can have a signature in different languages or Call to Action.
How does it work?
Your alias are now being displayed in your company co-worker emails list:
You can edit their design by going to your signature tab then select your alias from the dropdown:
You can view the data of your alias in the Analytics tab → Your signature → Dropdown:
Alias in your Gmail account
Here is how to switch from your primary email with it's related signature to an email alias with it's related signature from your Gmail/G-Suite account