how do letters play an important role in modern day world?

Answer 1

in business correspondence it is a good way to let someone know how things are going along, changes that will or won't be made, monies owed or collected, dates transactions are due and why.

in personal life, a letter from a friend brings us up to date to events happening in that friends life, brings us closer to being together when we can not be physically together. it can be a way to share our experiences, describing what we see in another land far from home...

Answer 2

Do you mean letters, like mailed letters, or letters, like the alphabet?