Where to put the content of the context column?
This question cannot be answered in general. There are different purposes for which the content in the context column has been used. Have a look at the examples for the contact box:
Content inheritance
You have content on a web page that you also want to display on other web pages and that was previously displayed via the inheritance function of the context column? Content inheritance is still not possible in the content area. As an alternative, you can reference content from other pages by using the paragraph reference component (ETHZ Extended). Read more about this in the AEM manual.