Creating robot.txt for CakePHP

What is robots.txt?

Robots.txt is a text file webmasters create to instruct web robots (typically search engine robots) how to crawl pages on their website. 

To learn more and see examples of robots.txt : https://moz.com/learn/seo/robotstxt

Cakephp - MissingControllerException Controller class Robots.txt

Create the robots.txt in your webroot/ directory.