Commenting dot will notify the friends that you have recently commented on some post. Which indirectly bring the user to the post. Suppose if your best friend or colleague commented on some specific post. You see that he or she recently commented on a post as an activity.

What does three dots mean on Facebook comments?

Instead of typing a random word in the comments to follow the development of a post, simply click the three dots that you see in the upper right corner of any post. Then, simply click the option marked, “Turn on notifications for this post.” (It works the same for both mobile and desktop environments.)

What does it mean to comment a period?

A comment period, in the context of administrative rulemaking, is a timeframe during the informal rulemaking process in which members of the public can submit written feedback to a federal agency regarding a proposed rule.

This means that if a post in a group or a post made by a friend imparts important information or is attempting to raise awareness for something, sometimes people will comment “bump” on the post to increase its engagement — or “bump” it up in other users’ feeds.