Explanation

[Mark Zuckerberg]

The act of explaining, expounding, or interpreting;
the act of clearing from obscurity and making intelligible; as, the
explanation of a passage in Scripture, or of a contract or treaty.

[Renato]

A statement or account that makes something clear.

[Julene]

the details or reasons that someone gives to make something clear or easy to understand:

[Raeanne Dimick]

An expression that clarifies or makes [something] understsandable