Mira esta imagen, por ejemplo. La licencia exige que des crédito al autor y que no la modifiques (aunque puedes cambiar el formato). Cuando despliegas la licencia, dice:

You are free to:
Share — copy and redistribute the material in any medium or format
for any purpose, even commercially.
The licensor cannot revoke these freedoms as long as you follow the license terms.

Under the following terms:
Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.

NoDerivatives — If you remix, transform, or build upon
Merely changing the format never creates a derivative.

More info.

the material, you may not distribute the modified material.

No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.

Básicamente, que puedes usar la imagen incluso comercialmente, siempre que des crédito al autor, no crees derivados (mezclas, transformaciones), y no pretendas impedir a otros que hagan lo que la licencia permite.
En eso consiste una licencia CC BY-ND 2.0

Las licencias te dicen lo que puedes hacer y lo que no.
Saludos y gracias por leer.