Defect reports are probably primary work product for most of the software testers. Good bug report, which is informative and understandable earns you a good reputation. Weak report generate extra work for everyone. Most of the time, a weak bug report is returned with comments saying not clear, need more information etc. That makes you work again on the same defect and thus reduces efficiency of testers and developers both. Defect reports are not only used by programmers, but also by managers, executives, documentation team and support executives for various reasons.