To start triggering a whole workflow based on the link your subscribers had clicked you need to do a few things. Go to Automation and click "Create a new workflow". Give it a name and choose a trigger "When your subscriber clicks a link". Type in your link below. You can also add Google UTM tags if needed in the link field. At the every end you can choose whether you want your workflow to reactive after the same person clicks the link in the future.
Now you can build out a whole workflow or keep it simple and send out an email to anyone who clicks your link. To do this click on the email, give it a name and click "Design Email". Here you can build an email from scratch, choose a template, or use one of the recent emails. Press done editing and there you go. Any subscriber who clicks this link will immediately receive this newsletter. You can now use this link in any of the other newsletters as well.
Use this feature for your subscribers to self segment themselves as well. For example, you can write in this newsletter saying “If your interested in geting notifications, click this link.” Anyone who clicks this link will be sent to a specific segment. This way can be used to launch whole email courses.