I'm trying to get to know how to add that big red text over the header image. See URL.
Also what is plugin name for the What people say on the bottom of the page.
For the moment your link is not sending me anywhere, but in the intro page of Aurum theme.
Can you please navigate to https://themes.laborator.co/aurum/ and then find the page that you are talking about and I will try to help you on that.
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This one https://themes.laborator.co/aurum/bookshop/
That area is made with the Layer Slider plugin. If you want to install that exact slider in your site you can import this slider (download here) in your Revolution Slider area and then add Layer Slider element in WPBakery Page Builder for that page.
Have a great day!
And that bottom area called "What people say?"
Please see this video to learn how easy we achieved that.
Have a great week!