Welcome email

Description

Currently, a Saas standard process that you send a welcome email after the user is confirmed the email address. It's a powerful way to influence and help user onboarding and first time experience.

As I pointed out in https://gitlab.com/gitlab-org/gitlab-ee/issues/7228 it's crucial to activate your users.

Welcome emails could be good for ee users to onboard users and also beneficial to gitlab.com as it could increase engagement and drive some traffic to content on gitlab.com

Proposal

After the user confirmed the email address of the account this should trigger a welcome email.

It might be good to include a git tutorial, customer success stories or just simply a link to the docs. In addition, I think would be awesome to mention they can create an issue to gitlab anytime.

What does success look like, and how can we measure that?

Better D1 retention