Behavioral tests are written in a way that can be understood by everyone. They provide documentation necessary for non-coders, while still maintaining the advantages of testing and automation. Tests can be written by stakeholders, managers and business representatives in plain English that is then translated into code by developers.
In web projects, the designers, developers and the customer are taking huge efforts to make sure that almost literally every pixel on the web page is where it should be and this is very important. While the website gets maintained, both by adding new content and by further developing the system, either with new features or by correcting errors, it is likely to happen that something is going to be presented differently from what had been signed off before. Not only is this one of the most annoying errors and the developers often get a bad reputation in the eyes of their customers, they can also be avoided by utilizing presentation tests. That way an automated system will take screenshots of all the relevant parts of a website and store them as a reference for future comparison. This allows automation tools to automatically run the tests again and compare those same areas with the result of the signed off version and if there are differences recognized, the developers get notified. They can then decide if the recognized changed has been intended, then the new version gets stored as the new reference, or they are not, then it needs to be fixed and tested again, until it matches the result of the previously stored reference.
Debugging is the process of finding and resolving of defects that prevent correct operation of computer software or a system.