Explanation vs Informative - What's the difference?

As a noun explanation

is the act or process of explaining.

providing information; especially , providing useful or interesting information.

(wikipedia explanation)

(en noun)

The act or process of explaining.

The explanation was long and drawn-out.

Something that explains, makes understandable.

An explanation for each UFO sighting was easily found.

(euphemistic) An excuse, apologetic justification not based on enough evidence.

expense.

* (act or process of explaining) clarification, elucidation, elaboration

* *

(en adjective)

Providing information; especially , providing useful or interesting information.

I read a very informative newspaper article on that subject last week.

(in standards and specifications) Not specifying requirements, but merely providing information.

* (providing information) informatory, instructive

* (providing information) uninformative * (not specifying requirements) normative