Previously, we can edit comments only within the few seconds after posting the comment. After these few seconds we can only delete the comment. Now, Facebook has introduced a new feature which will allow you to edit your Facebook comments anytime, even after 1 month so if you have made any typo and other mistakes in your comment, you can make changes in it anytime.
However, there is a bit of twist in this feature. Facebook will store the history of your comments as you edit them which will be visible to anyone. Facebook will show the list of your comments with edit changes.
So the conclusion of this whole thing is, if you want to make any typo corrections, grammar corrections or spelling mistakes then this new edit feature will work. But, if you are planning to change your opinions, views in older comments in a conversation then you should make sure you don’t make a fool of yourself as anyone on your profile will be able to see your Comment edits.
This is indeed a good improvement from Facebook as it will help you to improve the quality of your comment and on the same side it will prevent users form changing their opinion as people will be able to see your Edit history.