A custom short link is great for letting your readers know what they will be connecting too and gives confidence that it's safe to click when they see it shared on social networks. It's also a great way of you organising your zubbit links.
If your membership plan coming with this feature you will now see a new optional field asking for your shortlink when you create either a new CTA or Retargeting Link:
So instead of having your zubbit link assigned a code automatically i.e. zubb.it/abc123
You can now choose your own zubbit shortlink as shown below: