Carousel
Image views are only recorded if the site owner, has explicitly enabled image view stats tracking for this feature via the jetpack_enable_carousel_stats filter.

Data Used: If image view tracking is enabled, the following information is used: IP address, WordPress.com user ID (if logged in), WordPress.com username (if logged in), user agent, visiting URL, referring URL, timestamp of event, browser language, country code.

Activity Tracked: Image views.

Comment Likes
This feature is only accessible to users logged in to WordPress.com.

Data Used: In order to process a comment like, the following information is used: 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 you perform a like action 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.

Activity Tracked: Comment likes.

Gravatar Hovercards
Data Used: This feature will send a hash of the user’s email address (if logged in to the site or WordPress.com — or if they submitted a comment on the site using their email address that is attached to an active Gravatar profile) to the Gravatar service (also owned by Automattic) in order to retrieve their profile image.

Infinite Scroll
Data Used: In order to record page views via WordPress.com Stats (which must be enabled for page view tracking here to work) with additional loads, the following information is used: IP address, WordPress.com user ID (if logged in), WordPress.com username (if logged in), user agent, visiting URL, referring URL, timestamp of event, browser language, country code.

Activity Tracked: Page views will be tracked with each additional load (i.e. when you scroll down to the bottom of the page and a new set of posts loads automatically). If the site owner has enabled Google Analytics to work with this feature, a page view event will also be sent to the appropriate Google Analytics account with each additional load.

Likes
This feature is only accessible to users logged in to WordPress.com.

Data Used: In order to process a post like action, the following information is used: IP address, WordPress.com user ID, WordPress.com username, WordPress.com-connected site ID (on which the post was liked), post ID (of the post that was liked), user agent, timestamp of event, browser language, country code.

Activity Tracked: Post likes.

Mobile Theme
Data Used: A visitor’s preference on viewing the mobile version of a site.

Activity Tracked: A cookie (akm_mobile) is stored for 3.5 days to remember whether or not a visitor of the site wishes to view its mobile version. Learn more about this cookie.

Protect
Data Used: In order to check login activity and potentially block fraudulent attempts, the following information is used: attempting user’s IP address, attempting user’s email address/username (i.e. according to the value they were attempting to use during the login process), and all IP-related HTTP headers attached to the attempting user.

Activity Tracked: Failed login attempts (these include IP address and user agent). We also set a cookie (jpp_math_pass) for 1 day to remember if/when a user has successfully completed a math captcha to prove that they’re a real human. Learn more about this cookie.

Data Synced (?): Failed login attempts, which contain the user’s IP address, attempted username or email address, and user agent information.

Sharing
Data Used: When sharing content via email (this option is only available if Akismet is active on the site), the following information is used: sharing party’s name and email address (if the user is logged in, this information will be pulled directly from their account), IP address (for spam checking), user agent (for spam checking), and email body/content. This content will be sent to Akismet (also owned by Automattic) so that a spam check can be performed. Additionally, if reCAPTCHA (by Google) is enabled by the site owner, the sharing party’s IP address will be shared with that service. You can find Google’s privacy policy here.

Simple Payments
This feature is only available to sites on the Premium and Professional plans, and the actual payment processing is handled by PayPal.

Data Used: Transaction amount, transaction currency code, product title, product price, product ID, order quantity, PayPal payer ID, and PayPal transaction ID.

Activity Tracked: The PayPal payer ID, transaction ID, and HTTP referrer are sent with a payment completion tracking event that is attached to the site owner.

Data Synced (?): PayPal transaction ID, PayPal transaction status, PayPal product ID, quantity, price, customer email address, currency, and payment button CTA text.

Because payments are processed by PayPal, we recommend reviewing its privacy policy.

Subscriptions
Data Used: To initiate and process subscriptions, the following information is used: subscriber’s email address and the ID of the post or comment (depending on the specific subscription being processed). In the event of a new subscription being initiated, we also collect some basic server data, including all of the subscribing user’s HTTP request headers, the IP address from which the subscribing user is viewing the page, and the URI which was given in order to access the page (REQUEST_URI and DOCUMENT_URI). This server data used for the exclusive purpose of monitoring and preventing abuse and spam.

Activity Tracked: Functionality cookies are set for a duration of 347 days to remember a visitor’s blog and post subscription choices if, in fact, they have an active subscription.

Video Hosting
This feature is only available to sites on the Premium and Professional plans.

Data Used: For video play tracking via WordPress.com Stats, the following information is used: viewer’s IP address, WordPress.com user ID (if logged in), WordPress.com username (if logged in), user agent, visiting URL, referring URL, timestamp of event, browser language, country code. If Google Analytics is enabled, video play events will be sent there, as well.

Activity Tracked: Video plays.

WooCommerce Services
Data Used: For payments with PayPal or Stripe: purchase total, currency, billing information. For taxes: the value of goods in the cart, value of shipping, destination address. For checkout rates: destination address, purchased product IDs, dimensions, weight, and quantities. For shipping labels: customer’s name, address as well as the dimensions, weight, and quantities of purchased products.

Data Synced (?): For payments, we send the purchase total, currency and customer’s billing information to the respective payment processor. Please see the respective third party’s privacy policy (Stripe’s Privacy Policy and PayPal’s Privacy Policy) for more details. For automated taxes we send the value of goods in the cart, the value of shipping, and the destination address to TaxJar. Please see TaxJar’s Privacy Policy for details about how they handle this information. For checkout rates we send the destination ZIP/postal code and purchased product dimensions, weight and quantities to USPS or Canada Post, depending on the service used. For shipping labels we send the customer’s name, address as well as the dimensions, weight, and quantities of purchased products to EasyPost. We also store the purchased shipping labels on our server to make it easy to reprint them and handle support requests.