Add tag directly from an email

Hey there, just to add a recommendation I would love to have on fluent CRM. Today I was writing and campaign and wanted people to get a tag added to their user directly from the email if they clicked on certain button. Thats not available right now so I had to redirect them to a form submision landing page and from there if they fill up the form they get the tag. It would be easier if they could just click on a button with a URL and putting up on fluent CRM that with certain page visit o click url a tag is added automatically to that contact.