Today, social media is becoming an important and necessary part of our life. With using them, we can communicate with others easily although they are very far from us. Besides, one of the ways of communication is letters, which used to be very popular. Nowadays, we still send letters but this has many disadvantages. First, If your friend is a pen pal, It will take almost three days to receive a letter. Second, sending a letter has many risks. One of them is that your letter won't be sent to the right place. Third, I think we should use the modern way to save time. To summarize, I think that communicate by letter has both cons and pros. If you can use social media, you can save time.