It purges the acne and then heal them to reduce them, minimizes the pores and smoothens the skin. One bottle goes a long way too. I thought it will not last for 30 days but so far I've only used probably around 60%.
It is kinda drying, makes your skin a little red, and depends on your skin condition you may need more than 30 days.
FULL REVIEW: http://stylevanity.com/2018/09/some-by-mi-miracle-toner-review.html