Description

The Short subject for the bug report section will be used at the start of the emailed bug report. You do not need the package name in it as you have already assigned that. But being specific is good. "Crash when I try to save" or "Forgets my preferences" is much better than "Bug". Hackers will read these summaries when looking for something they can fix, and clear one-sentence summaries will catch their attention.

The Full description of the bug section is where you describe what you did, what happened, and what you expected to happen. Good things to include:

If you have any suggestions on what caused it or how to fix it, wonderful. If not, don't worry. Just explain what happened. If a developer needs more information, s/he can mail you back for it.