In this article, Mariusz Felisiak discusses context processors in Django, which are functions that accept a request and return a dictionary populated to the template context when any template is rendered. Context processors allow following the DRY (don't repeat yourself) principle in template rendering and keep code more maintainable. The author provides an example of how to use context processors to share information about the current version and environment of a project for all templates, making it easier to display relevant headers based on the environment settings. Context processors can be used to pass various types of data between templates, improving code organization and reducing repetition.