
Editing is the backbone of Stack Exchange. Every question and answer pair is intended to be an evergreen, editable resource for future travelers:
The editing feature is there so that old question/answer pairs can get better and better. For every person who asks a question and gets an answer on Stack Exchange, hundreds or thousands of people will come read that conversation later. Even if the original asker got a decent answer and moved on, the question lives on and may continue to be useful for decades. …