This is truly a mystery to me. When I get new email, it's normal for me to receive an audio notification on my Droid RAZR. However, when I visit my Gmail Inbox via my browser on my PC, my Droid RAZR plays the notification sound. I'm not even really sure how it knows what I'm doing. I realize it's connected to Gmail, but it's still quite strange.
This morning I sat down at my computer to find I had several new emails. I began reading and managing them in Gmail (on my PC), and during this time my phone notified me of new email at least 3 times, yet I didn't actually receive any 'new' email at that time. It was all because I was going to my Gmail Inbox.
How does my phone know that I've done this? Sometimes I don't even really have to DO anything. If I already have a browser tab with my Inbox, and then at some point I simply go to that tab and there happens to be new email in it, within a few seconds my phone will notify me. It's quite bizarre.
What is the explanation for this?
Recent example: I was just browsing the internet on my PC when I noticed I had some incoming emails (my phone played the audio notification, and I also can tell via my gmail notifier app in my system tray). I was watching YouTube videos at the time. After a few minutes I left YouTube and went to gmail.com, to my Inbox. I clicked to view the first unread email there. During this process, my phone played the incoming email audio notification not just once, but twice. This is before actually doing anything with any email. All I did was view it. I really don't understand why/how this happens.
Update to recent example: After updating this post with the recent example I just gave, I went back to my Inbox tab (yes, I had left my Gmail Inbox open in another Firefox tab). When I went to the tab, which still contained a couple unread messages as I had not viewed them all yet, my phone played the notification AGAIN. I really want to know why this happens.