Multiple Tapback reactions (the heart, thumbs up/down, "HaHa", "!!" and "?" stickers that you can put on people's messages) will stack on each other, making it hard to see what is there. If you don't see the notification as it happens, you won't know who sent a reaction or what it was. There is a way, however, to see this in more detail so you can see who sent what reaction - just tap on the stacked reactions.
Email and Messaging
If you have ever received a zipped or compressed archive as an email attachment and tried to open it on your iPhone, you've seen that you can view the contents but can't edit the individual files, or share them individually. Surprisingly, as of iOS 12, there is no built in option to extract zipped files. You can, however, easily create a shortcut that will do it for you. Here's how to do it on iPhone and iPad:
Apple introduced full screen animations in the messages app with the release of iOS 10. iPhone users can send other iOS users nine different animations such as balloons, confetti and fireworks through the Messages app. These animations can be individually selected and attached to any text message, or automatically triggered by typing key phrases. Apple hasn't released an official list of what phrases invoke what screen effects, but they did demo the Happy Birthday feature at WWDC 2016.
We've all had text message conversations that have turned into too much for texting, requiring a call instead. iOS 12 now lets you easily make that call directly from the conversation rather than leaving and opening your Phone app. Just tap on the picture/name of the person at the top and a menu will appear with options to start an audio or video call, plus an info button for other message thread details.