Whether technical information is easy to understand depends mainly on how it is presented at the level of small structures such as words and sentences. It can also involve larger structures such as examples and scenarios.

Aspects

Clarity
Freedom from ambiguity or obscurity; the presentation of information in such a way that users understand it the first time.
Concreteness
The inclusion of appropriate examples, scenarios, similes, analogies, specific language, and graphics.
Style
Correctness and appropriateness of writing conventions and of words and phrases.

References