So I know that Google has some documentation about publish date and when those should be updated. As with most things, it's vague. I was curious to know what everyone else does when it comes to updating publish date if you update an article.

I work on a lot of news sites, and there are mixed feelings about updating publish dates (obviously depending on the article and how much content is changed).

Have any of you seen any difference in articles where you did change the publish date vs not?