What is Code Quality in Agile?

If your company is developing or planning to develop a software product, how much time are you spending on code quality control, and how much on other things like marketing?

As a CEO, COO, or other c-level managers, you are probably much more concerned about the business side of things, rather than the technical side like checking if the code is written and works properly. Instead, you leave that part to your developers, which is perfectly understandable.