The default embed code that you get after publishing your project allows you to include the involve.me project in the content area of your website - similar to a widget.
With the fullscreen embed code, you can have it overlay the visible area of your website completely. The involve.me project will load in front and hide your website fully.
You can specify which color is in the background while the embed is loading (or set it to "transparent").
Alternatively, click on "Download HTML file" to download a complete page you can upload to your own server, eg. via FTP. Create a new folder in your website directory like "quiz" and name the file you upload "index.html".
This will make your embed be available under website.com/folder
If you have any questions please contact support.