The document discusses the key properties of well-written text, including organization, mechanics, coherence and cohesion, and language use. Organization refers to the logical progression and completeness of ideas through elements like text structure and transition words. Mechanics covers technical aspects such as grammar, punctuation, spelling and parts of speech. Coherence and cohesion relate to how easily understandable and connected ideas are within a text. Language use considers style, tone, clarity and adapting language to the intended audience.