1. Concise: Symbols can replace long words, making sentences or paragraphs more concise and clear. For example, "A is greater than B" can be represented by ">".

2. Emphasis: Symbols can be used to emphasize a certain point of view or information. For example, "important!" You can use "!" To show.

3. Classification and sorting: Symbols can be used to classify and sort information. For example, "first", "second" and so on can be represented by numbers or letters.

4. Expression in mathematics and science: In mathematics and science, symbols are essential. They are used to represent unknowns, variables, functions, formulas, etc.

5. Logical relationships: Symbols can be used to express various logical relationships, such as AND, OR and NOT.

6. Linguistic diversity: Different cultures and languages may use different symbol systems, which helps to express complex ideas and concepts.

7. Improve readability: For people who are unfamiliar with a certain language, symbols can help them better understand the content of the article.