tl;dr I have two plugins installed: Jetpack and Google Analytics, that as far as I understand, collect certain browsing data such as your IP address to show me site statistics (mainly page views).
Our website address is: https://www.kvnmei.com.
Data 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. Important: The site owner does not have access to any of this information via this feature. For example, a site owner can see that a specific post has 285 views, but he/she cannot see which specific users/accounts viewed that post. Stats logs — containing visitor IP addresses and WordPress.com usernames (if available) — are retained by Automattic for 28 days and are used for the sole purpose of powering this feature.
Please refer to the Google Analytics documentation.