I think the most important thing is: fun! Direct lyric!
In our society, most people are ashamed to express their true feelings, because everyone's true heart has something more or less out of place, and most people are embarrassed to discuss and express some things and feelings in order to maintain an "image", so expression packs have played a very good role at this time.
In group chat, you will often see some girls who are usually more convergent. Once they switch to the expression mode, they will be out of control.
"I made this expression, but I don't really think so. Someone else said it. I'm not responsible for what others say anyway. 」
The expression pack users got it at the same time? Shame immunity+unloading the burden of responsibility? Double halo.
Expression pack is actually a modern idiom. People are complicated, people's subjective feelings are complicated, and this objective world is even more complicated.
In the past, many three-character idioms and even two-part allegorical sayings were invented in culture. In fact, because the length of two Chinese characters has a limited permutation and combination, and the amount of template description information that can be reused has an upper limit, long vocabulary is needed, because people can only communicate based on words at that time (pronunciation and words, even sign language, are all based on words).
However, the Internet makes it impossible for people to communicate based on pictures, even animations and videos, and images, whether moving or not, can carry 10,000 times as much information as the upper limit of characters.
In the final analysis, this is a revolution in expression and another progress in human language.