What significance did the formation of speech and writing have for human evolution?

Grand in its historical significance and consequences was the emergence of writing. Compared to speech, writing is a fundamentally new means of communication that allows you to consolidate, store and transmit speech information using descriptive characters. Written signs are material mediators in the communication of people among themselves.
In contrast to direct verbal communication, writing is able to overcome the spatial and temporal boundaries of human communication, go beyond the direct interaction of subjects, and deploy the content of communication in space and time.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.