Joomag's Crater Editor gives various tools to enhance your publications with interactive digital content and the web page plugin is one of them. It basically lets you embed a webpage right in your publication: your readers can browse the website right from the publication.
To achieve this result, you simply need to
Open your publication in the Edit mode
In the left toolbar find the plugins and click on the Web page plugin
Paste the URL in the popup
A rectangular shape will appear in the middle of the page: you will just need to relocate it where you need the embedded page to appear and resize it by dragging its corners