Note by @fastfinge

I must be old. I really don't understand emoji reactions. If I say "I'm on the bus and will be there in half an hour" to the group message, why do five people need to react with the bus emoji? A thumbs up or a heart or a smile I get. It communicates some sort of information. You like it, or you're happy, or whatever. But all reacting "bus" communicates is that...the word bus was in the original message, and you recognized it! Yes! Good for you! You recognized the word bus! Do you want a cookie or something?