Red or blue envelope aside, the unread message icon can be used to display how many new messages you have in your inbox, which admittedly does seem pretty cool. And aside from that, Gmail has lots ...

With every app change, learning new icons and tools is an adjustment period. The Google Messages app is going through that now, changing up what a sent, delivered, and read message icon looks like.

These icons indicate what stage a message is in, such as if it's been sent, delivered, or read. Below is an outline of what the check marks in Facebook Messenger mean.

The change is supposedly coming from Labs, a feature in Gmail that let's you customize the appearance of your inbox, says HelloGiggles.Within Labs, there's something called "unread message icon ...

A darker blue dot then appears and does the same on the layer above it. The tail underneath gets obscured and we arrive at the final icon. This animation is similar to the one Google shared on ...

If you're using the stock Messages app on a Samsung phone, the blue dot at the bottom of a contact's profile icon means that both you and that contact have RCS messaging enabled.