Biochemistry: what is a micelle?

Tutoring biology, structures arise. The tutor mentions the idea of a micelle.

A micelle is a rounded structure consisting of an outer layer and some cargo inside. Of the molecules forming its outer layer, each is two-sided, with one side being chemically attracted to the external environment, while the other is repulsed by it, but attracted to the cargo.

Soap bubbles are micelles: each soap molecule has an end that is attracted to water, while its other end doesn’t like water, but is instead attracted to oil and/or dirt. Therefore, inside a soap bubble, one may find a payload of dirt.

Source:

medicine.yale.edu