Today I got several mails from "Ledger" advising me to install an important security update.
My curiosity was piqued, so I entered the URL on my Android tablet and got to a Google site which looks remarkably like the Ledger Live app under Windows.
Fun fact: No Ledger device was connected at the time when the error occured 😉
So, stay safe out there! And NEVER follow such a link from an email. Always user your bookmarked browser links!