When editing it in the HTML mode, it stops unintended removal of br tag and p tag , either addition of p tag. And when editing in the visual mode, it achieves to generate natural changing line and paragraph that you will intend.
© 2019 Prime Strategy Co.,Ltd. Otemachi 1st Square Bldg. East Tower 18F, 1-5-1 Otemachi, Chiyoda-ku, Tokyo Japan