Comment Likes are a fun, easy way to demonstrate your appreciation or agreement.
You’re involved in an interesting conversation in the comments section of a post on your favorite blog. Another commenter says something particularly astute, and you’d like to show them you appreciate their comment.
Underneath their comment, you’ll see a Like button:
Click the blue star, and the star color and text updates to show that you’ve liked the post:
If you change your mind, click the star again to unlike the post.
If additional people like the comment, the text will update to indicate the number of likes.
To access Comment Likes, the site must have Comment Likes enabled and you must be logged into your WordPress.com account.
Enable Comment Likes
Once activated, the Like button will be displayed under every comment on your site. You can activate Comment Likes by following these steps:
Navigate to Jetpack, then Settings and Discussion.
Click the toggle next to Enable Comment Likes to activate Comment Likes.
To disable Comment Likes, click the toggle again. The Comment Like button will disappear, and all Likes will no longer appear on any comments.
If Show Likes is deselected in the Likes and Shares box and/or Comments are disabled for a particular post, Comment Likes will be disabled as well.
Managing Comment Likes
Once you enable Comment Likes, you can control who is able to use them with the Disallowed comments. If you see Comment Likes coming from a spam account or other source you’d like to disallow, add the person’s email address, name, or username to the Disallowed comments.
To locate your Disallowed comments, go to the Discussion Settings page. You’ll find the Disallowed comments near the bottom of that page.
Add the names and/or email addresses you’d like to disallow in the Disallowed comments box.
Scroll to the top of the Comments section and click Save Settings. The Comment Like option will no longer be visible for these visitors.
Troubleshooting
My Likes Disappeared?
If you transfer your site or change the site URL settings, your Comment Likes count will be reset, and start counting again.
Likes cannot be migrated from one site to another.
Likes not loading
There is a known issue between Cloudflare’s Rocket Loader and Jetpack Likes. You’ll consequently need to disable this feature in your Cloudflare settings.
If you have a cache/optimization plugin minifying JavaScript, the minification could cause the Likes button to sit just Loading. Please, try to deactivate the minification to solve the issue.
This feature is deactivated by default. If you ever need to activate it, you can toggle the Enable comment likes setting from the Comments section at Jetpack — Settings — Discussion.
Data Used
Site Owners / Users
To formally process a like action, we use the WordPress.com user ID/username (you must be logged in to use this feature), the local site-specific user ID (if the user is signed in to the site on which the like occurred), and a true/false data point that tells us if the user liked a specific comment.If a like action is performed from one of our mobile apps, some additional information is used to track the activity: IP address, user agent, timestamp of event, blog ID, browser language, country code, and device info.
Additionally, for toggle tracking (detailed below): IP address, WordPress.com user ID, WordPress.com username, WordPress.com-connected site ID and URL, Jetpack version, user agent, visiting URL, referring URL, timestamp of event, browser language, country code.
Site Visitors
To formally process a like action, we use the WordPress.com user ID (if the user is signed in to WordPress.com), the local site-specific user ID (if the user is signed in to the site on which the like occurred), and a true/false data point that tells us if the user liked a specific comment.If a like action is performed from one of our mobile apps, some additional information is used to track the activity: IP address, user agent, timestamp of event, blog ID, browser language, country code, and device info.
Data Tracked
Site Owners / Users
We track by who, and when, a specific comment was liked.We also track when, and by which user, the feature is activated and deactivated.
Site Visitors
We track by who, and when, a specific comment was liked.
Jetpack 
Comment Likes
Comment Likes are a fun, easy way to demonstrate your appreciation or agreement.
You’re involved in an interesting conversation in the comments section of a post on your favorite blog. Another commenter says something particularly astute, and you’d like to show them you appreciate their comment.
Underneath their comment, you’ll see a Like button:
Click the blue star, and the star color and text updates to show that you’ve liked the post:
If you change your mind, click the star again to unlike the post.
If additional people like the comment, the text will update to indicate the number of likes.
To access Comment Likes, the site must have Comment Likes enabled and you must be logged into your WordPress.com account.
Enable Comment Likes
Once activated, the Like button will be displayed under every comment on your site. You can activate Comment Likes by following these steps:
To disable Comment Likes, click the toggle again. The Comment Like button will disappear, and all Likes will no longer appear on any comments.
If Show Likes is deselected in the Likes and Shares box and/or Comments are disabled for a particular post, Comment Likes will be disabled as well.
Managing Comment Likes
Once you enable Comment Likes, you can control who is able to use them with the Disallowed comments. If you see Comment Likes coming from a spam account or other source you’d like to disallow, add the person’s email address, name, or username to the Disallowed comments.
To locate your Disallowed comments, go to the Discussion Settings page. You’ll find the Disallowed comments near the bottom of that page.
Add the names and/or email addresses you’d like to disallow in the Disallowed comments box.
Scroll to the top of the Comments section and click Save Settings. The Comment Like option will no longer be visible for these visitors.
Troubleshooting
My Likes Disappeared?
If you transfer your site or change the site URL settings, your Comment Likes count will be reset, and start counting again.
Likes cannot be migrated from one site to another.
Likes not loading
There is a known issue between Cloudflare’s Rocket Loader and Jetpack Likes. You’ll consequently need to disable this feature in your Cloudflare settings.
If you have a cache/optimization plugin minifying JavaScript, the minification could cause the Likes button to sit just Loading. Please, try to deactivate the minification to solve the issue.
Get Help
Contact Jetpack Happiness Engineers to get further assistance.
Privacy Information
This feature is deactivated by default. If you ever need to activate it, you can toggle the Enable comment likes setting from the Comments section at Jetpack — Settings — Discussion.
To formally process a like action, we use the WordPress.com user ID/username (you must be logged in to use this feature), the local site-specific user ID (if the user is signed in to the site on which the like occurred), and a true/false data point that tells us if the user liked a specific comment.If a like action is performed from one of our mobile apps, some additional information is used to track the activity: IP address, user agent, timestamp of event, blog ID, browser language, country code, and device info.
Additionally, for toggle tracking (detailed below): IP address, WordPress.com user ID, WordPress.com username, WordPress.com-connected site ID and URL, Jetpack version, user agent, visiting URL, referring URL, timestamp of event, browser language, country code.
To formally process a like action, we use the WordPress.com user ID (if the user is signed in to WordPress.com), the local site-specific user ID (if the user is signed in to the site on which the like occurred), and a true/false data point that tells us if the user liked a specific comment.If a like action is performed from one of our mobile apps, some additional information is used to track the activity: IP address, user agent, timestamp of event, blog ID, browser language, country code, and device info.
We track by who, and when, a specific comment was liked.We also track when, and by which user, the feature is activated and deactivated.
We track by who, and when, a specific comment was liked.
We sync a single option that identifies whether or not the feature is activated.
None.
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