Personality signature s usually stands for "mystery" or "strangeness". Many people who like uniqueness like to use the letter S as a representative in the personality signature of social networks or chat software. The letter S may also stand for "strength" or "confidence", which is related to one's personality. Different people have different understandings of the letter S, sometimes to show their individuality and sometimes to attract others' attention.

The letter S has another definition, meaning "seconds kill", which is a term often used by gamers. If a gamer is very strong and can easily beat his opponent, then he may use his signature S to show his great strength, which can also be his symbol. However, it should be noted that only truly powerful people can use this personalized signature.

In addition, the letter S has different meanings in different cultural backgrounds. For example, in western culture, the letter S can represent a type of personality, which is called "S-type personality". People with this personality have the characteristics of strong self-assertion, strong decisiveness and strong sense of purpose. In Japanese culture, s is also considered as sex addiction, which stands for "abuse" and is related to personal sexual orientation. Therefore, when using personalized signature, we need to think according to the specific cultural background.