Workflows Signup/login and reusables

Need help
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Conection between pages, headers and reusables.

I’m trying to create an APP but even though I have copied some parts like header, with SIGN UP and LOG IN and their respective popups, reusable elements, from another APP, including copies with workflows, they simply don’t work when you preview and try to sign up or log in. Maybe I need to understand things better but, by asking some questions , hopefully I’ll get some clarification on these matters. So,
Floating groups are always visible, even if I change pages right?
What’s the difference between a floating group and a header?
Do I always need to create a group to insert floating groups and headers inside?
What is the correct form to create a reusable since I’ve seen it on a video but I didn’t understand the process. First you create whatever you want in a separate page, make it reusable and then delete the one you created to paste it on the same place as a reusable? Why?
Why workflows of a header are separate from the rest of workflows?
When I create a popup and make it reusable, do I need to create only one workflow for it that will work on other pages whenever I use that popup?
It seems I’m not making the right conections between the elements.

2
  1. Floating groups are always visible when you scroll through the page they are placed in. If you navigate to another page they disappear with the rest of the page
  2. A Floating Group is a native Bubble element, while a header isn’t, it’s more a concept in web design. Headers are normally implemented with Floating Groups, Groups or inside a Reusable Element of type Group or Floating Group.
  3. A Floating Group does not need to be inside another group. In fact this strategy prevents the Floating Group to float while scrolling through the page.
  4. No need to create another page and then turn into a Reusable Element. That’s one way of doing it, but it’s not the simplest one. Just create a new Reusable Element and work directly from there.
  5. Workflows of a Reusable Element are separated from the rest of pages and reusable elements. It helps with maintainability of the (no)codebase.
  6. Workflows that you create in a Reusable Element are available there where you place it
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Thank you so much for your time. I will try to process all the info and try to straight it out here. Best regards.