When you publish websites, write blog posts and make them available on the internet, it’s not uncommon, that you also want to get statistics about how many people read your stuff, how many people visit your website etc. And you also want to enable comments under your blog posts, giving people an opurtunity to ask questions or just leave a reply. For the first case Google Analytics is the most widely used solution.
Many people use Google Chrome, because they like it’s fancy syncing feature. You know, open a tab on your PC and just continue on your phone. Or because of the nice built-in password manager. Just save that damn password and it’s securely stored in your Google account and available everywhere. But what about privacy? You can forget it when you use Chrome. You have no privacy there. Google can read all of your browser history, passwords and bookmarks.