It is not something I use, but I will try, or someone else maybe able to help or add more.
I assume you are using the add-on included with Blender, glTF 2.0 format, all you need to do is enable it. I suggest researching the docs for info.
The Blender Manual is there to help with this.
As far as animation actions is concerned, when exporting other formats the NLA editor is used for specific actions. Maybe that would be another area to research.
Jonathan uses the NLA editor in the Animating First Person Character Weapons course.
The workflow for 3D web assets I imagine being similar to that of game assets.
Sorry I can’t be of more help.
