What are the advantages and disadvantages of verbal and written language in interpersonal communication?

Verbal language is concise and easy to understand.

Verbal language is concise and easy to understand, if you can do with where people say where the verbal language, it will make people feel very friendly, will be close to the distance, verbal language is only limited to ordinary interactions, or private conversations. Written language, more formal, formal some of the places are used to.

Written language is the language that is written down for "seeing", which is formed on the basis of the spoken language, so that the language symbol system of hearing becomes the language symbol system of "seeing". Written language is produced on the basis of spoken language and is a processed form of spoken language, so the two are basically the same. Since written language is the language people use to communicate in texts, it has its own inherent stability compared to spoken language. This is reflected in both spatial and temporal spans.

In the spatial span, the same written language can be used despite the fact that dialects are very different, spoken languages are very different, and even different languages may be used. (For example, the use of the ancient Chinese language Wenyan in the south and north, and its influence on East Asian countries such as Japan and Korea.)

In terms of time span, while the spoken language evolves greatly over tens or hundreds of years, the written language changes very little in the meantime.

The written language not only records changes in language throughout history, but also spreads a language to other linguistic regions as it spreads, so that educated people in other linguistic ranges are influenced by another written language and bring elements of that written language into the spoken language, affecting the changes in the local spoken language, and accelerating the speed and scope of integration of the various different languages into each other.