Pop-ups an permanent messages

Hi all!
Is it possible to create pop-ups? For example, in a workflow when a condition is true the action will be show some message. I know that is possible send an email, but I need that users to be able to see the message instantly.

On the other hand, I am interested showing a permanet message in some modules. Is there any option?

Thanks!

María.

In my opinion. That will be better by adding custom custom javascript on a particular view.

Workflows are back-end, you can’t do front-end stuff from there.

For the other messages, this might be an easy way to achieve it: