These days it is pretty popular to message use emoji. It’s kinda strange to think that people use a lot emoji rather than possible words but you can see why when you realise you can express things that are hard to express in words or add an “emotion” to something.
But when you think about it, words seem to limit you in the ways of thinking and expressing, you may have to substitute with another word to fit a unique seeming situation that doesn’t have a word (or maybe just borrow from another language I guess like what Japanese do a lot). There is research that suggests that through different language compared to each other, each one might limit or influence the thinking of those who use the language.
Art can express many different things that you may require many words to express or find hard to write in words and it can be amazing what you can see compared to what can be written, plus anyone (who is human usually) can understand it. Kind of “actions are more powerful than words”. Slient comics can also show that interesting things can be expressed without words.
The problem (which is easy to spot) is the openess to interpretation and the lack of directness of pictures such as emoji. Different people can attribute different meanings to them or misinterpret them. Also you can’t really write an essay or write about anything serious as you aren’t being precise. But visual communication can be useful and sometimes, even better. Well at least I enjoy it and in fact I think it is pretty cool.. as long as you use words too.