Comments
Comments are a way for visitors to add feedback and reply to your posts and pages. If you choose to enable comments for your posts, then a comment form will appear at the bottom of the posts and people can respond to what you have written.

Enable/Disable Comments
In Settings
You can enable/disable comments on future posts in your Discussion settings under My Site(s) → Manage → Settings. Next, click on the Discussion tab.
Under “Default article settings,” toggle on or off the option to “Allow people to post comments on new articles.”

On a Post or Page
You can enable/disable comments on a post you’ve already published by going into your post’s More Options. On Pages comments are disabled by default, but you can enable them when publishing a new page or editing an existing one in the same location.
- Go to My Site → Site → Posts or Pages and select the post or page you want to enable (or disable) comments on.
- In the Document sidebar, find and open the Discussion tab.
- Select Allow Comments to enable comments, or deselect the option in order to disable comments.

For a Group of Posts or Pages
If you would like enable/disable commenting for a group of posts or pages, go to your WP Admin → Posts or WP Admin → Pages and follow the directions for Bulk Editing.
How to Leave or Read Comments
To leave a comment, you’ll need to be on the individual post page — you can’t leave comments on a blog’s home page, only a specific posts.
To find the individual post page, click on the post title. This opens the individual post. Scroll to the bottom of the post; as long as the blogger has enabled comments, likes, and sharing, you’ll be able to leave a comment, like the post, or share it to social networks like Twitter or Facebook.
Comment Management
Blog owners are in complete control of the comments left on their blog. Users on the blog who have Editor or Administrator rights will have the ability to manage comments.
Automatically Closing Comments
It is possible to turn comments off automatically after a specific number of days. To do this, visit the Settings → Discussion page and toggle on/off the option for “Automatically close comments on articles older than X days.”

Comment Moderation
To prevent spam from coming in on the comments, you can set Comment Moderation rules and Disallowed Comments. Both options are available from Manage > Settings >Discussion. More details can be found on Discussion Settings.
Can I edit comments I left on someone else’s blog?
No, it is not possible to edit or delete any comments you have left on other WordPress.com blogs. Blog owners are in full control of the comments on their blogs, so you can try contacting the blog owner and ask them to edit or delete a comment for you. If the blog owner has not posted any contact information, you can try leaving a short comment asking how to contact them directly.
More Comment Features
There are some noteworthy comment features at WordPress.com such as:
Learn more
The Perfect Host: Comment Moderation (The Daily Post, October 10, 2012)
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