Gmail wants your phone number, but some users are getting angry about requests to submit it—what you need to know.

but there are now email-tracking tools that make it easy for people to see when you open an email, what you click, and where you're located. "Emails appear no different to your contacts ...

Google also mentioned that they, “made it easier to get to Contacts and Tasks,” and that you’ll see links to the two in the upper left hand corner of your screen right under the Gmail logo.

"Emails appear no different to your contacts ... your emails in Gmail are being tracked, and it even works before you click anything. With Ugly Email installed, you'll see a tiny little eye ...