What is Kim Yo Jong's exact role in North Korean politics?

Claims that Kim Jong Un's younger sister, Kim Yo Jong, is now the second-most powerful figure in North Korea and a potential successor to her brother are "exaggerated," a South Korean government minister said -- contradicting assessments by other top officials in Seoul.

source https://www.cnn.com/2020/08/26/asia/kim-yo-jong-role-intl-hnk/index.html