Make.com is a powerful automation platform that enables individuals and teams to automate tasks, connect apps, and streamline workflows without the need for coding skills. It offers a visual interface and drag-and-drop functionality, making it easy to create automated workflows that span multiple applications and services.
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What does xml mean?
XML means Extensible Markup Language
In computing, Extensible Markup Language (XML) is a markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable
The design goals for XML were simplicity, generality, and usability across the Internet. It is a textual data format with strong support via Unicode for different human languages. Although the design of XML focuses on documents, the language is widely used for the representation of arbitrary data structures such as those used in web services.
Several schema systems exist to aid in the definition of XML-based languages, while programmers have developed many application programming interfaces (APIs) to aid the processing of XML data.
Source: Wikipedia
What does QR-code mean?
A QR code is a two-dimensional barcode, developed by Denso-Wave. QR stands for quick Response, because the code is quickly decryptable. You can scan the QR code with a mobile phone or PDA. If you have internet on your mobile phone, you can easily open the link without having to tap the address. In a similar way, email addresses, SMS messages, phone numbers and texts (up to 7089 characters) can be offered. An example code is listed below, which goes to this website. 
You can create these codes Via Google Charts API. At the very bottom of this post an online way to create a QR code using Google Charts.