When everyone has read a group message in WhatsApp the two tick icon next to the time at the bottom on the right turns blue.
If you can all make sure you have read your messages before I go to bed each night I can just pass my eyes over all the blue ticks and know that you are safe and sound.
Also Zoom seems too be having its day in the sun. Vince and Mandy both mentioned it to me yesterday and Ollie ran a quiz on it last night. One to watch,