What are the advantages of the use of epistolary technique in Mariama Ba's So Long A Letter?

the advantages of the epistolary technique is to allow us the readers to see the narrative as a form of 'gossip' between Ram and her bestfriend. it serves to show that women are better at riting their feelings as it may be hard to share their losses orally. another advantage is to show the contrast of Ram and her friend to whom she writes, it gives her the confidence to portray her feelings as well as to highlight the effects that men/ her husband had on her and other women. so in essence it serves as a window from which to veiw society from a feminist perspective as it relates to the exploitation of women in Sengal (a representation of women worldwide)