There Are New Text Effects, Too

Granted, text effects and animations aren’t new in the Messages app. Effects like Slam, Loud, and Gentle have been around for a while, along with full-screen effects like fireworks and confetti to make your messages more interesting.
But it seems that wasn’t enough, according to Apple. Now, you’ll have a list of new Text Effects to choose from that can be applied to individual portions of a message, letting you shake or explode the words in your text.
The biggest difference between the old and new effects is that the new effects will let you choose specific words instead of having to use the animation for the complete message. This means that you can use different effects for every word of your text, although that might be a bit too overwhelming. Still, it’s good to know you have the option.

At the time of this writing, the effects in iOS 18 are Big, Small, Shake, Nod, Explode, Ripple, Bloom, and Jitter.