An icon in the shape of a lightning bolt. Impact Link The comments below a YouTube video are sometimes more fun than the video itself, and it's easy to join the conversation with a couple of clicks.

You can delete a comment on Instagram if you've written it on someone else's post, or if someone else has written it on your post. You can also hide offensive comments, or block certain users' ...

To comment anonymously in Facebook groups, the group must allow anonymous posts. You can only comment anonymously on your own posts. Just find your anonymous post, click “comment,” and it will stay ...

One important way that scientists can get involved in public policy is making a public comment. Agencies must offer opportunities for public comment on proposed rules during the rulemaking process.