It helps establish a positive association with toothbrushes and dental care.
The lyrics encourage children to protect their teeth from "sugar monsters" or decay, often personified in similar media like "Hacki Backi". Mein Freund der Zahn || Kinderlieder zum Lernen
Like most Kinderlieder zum Lernen (Songs for Learning), it uses repetitive, simple melodies that are easy for young children to memorize and sing along to. It helps establish a positive association with toothbrushes