Thread:Drax321/@comment-22439-20141028195733/@comment-112155-20141028213542

It depends. There are editors who add a summary for each of their edits, and there are others who don't add them at all.

I only use it when the change needs a particular explanation, but not for usual changes like fixing spelling mistakes, adding content from released media, etc.

But these about a change of films, that are relatively important changes, it's better to add a summary to avoid people edit-warring adding and deleting them.