Question:What is the function of wrapper? 

The Wrapper module links external, non-Joomla! created content inside a so-called iframe.

Question:What are the parameters of Random Image module? 

The parameters include:
- Image Type
- Image Folder
- Link
- Width (px)/Height (px)

Question:Why syndication module is used? 

The website's news feed is delivered by the Syndication module. We can define the standards that we are offering in the parameters. The articles on the front page represent the content of the offered news feed.