Hi I am new to adobe target, I have read some parts of the documentation, however you can only modify content and add new pop up box on top of the existing layer/your webpage.
I would like to know if I can add new container to the existing webpage without needing to code/to touch the existing webpage that I have?
If I understand your question correctly, it is possible to add a new html container (div) to the page without needing to modify the existing web page. That's one of the things Target does best. Here's a demo of one simple way to do this.