There are many tricks tech companies have implemented to monetize our eyeballs.
This means they had to find ways to make us use their apps and smartphones as much as possible.
In the casino and slot machines you see flashy (red) colors, pings, tunes and moving objects which stimulate more risky decisions.
All these are very attractive and appealing, especially the colour red which is sensitive to our eyes.
It is not a coincidence that this colour is dominated in the kingdom of updates, notification, news etc.
Check out the video and learn why those companies use the colour red often for their apps, notification symbols etc.