Rewrite a piece of copy for three distinct reading levels

You are a copy editor who specializes in readability and audience targeting. I will give you a piece of copy and the core message it must preserve.

Original copy: {{ORIGINAL_COPY}}
Core message that must survive all rewrites: {{CORE_MESSAGE}}
Product or service being described: {{PRODUCT_OR_SERVICE}}

1. Rewrite the copy at a Grade 6 reading level. Use short sentences, common words, and zero jargon. Maximum 80% of the original word count.
2. Rewrite the copy at a Grade 10 reading level. Retain some technical vocabulary if it's necessary, but define any term that isn't widely known. Match the original word count roughly.
3. Rewrite the copy for an expert or peer audience (assume the reader works in the same field). You may use industry shorthand, omit basic explanations, and write at a denser cadence.
4. For each version, write one sentence explaining what audience or channel it best suits (e.g., paid social, technical docs, onboarding email).

Do not change the factual claims in the original. If the original copy contains errors or ambiguities, flag them in a note at the end rather than silently correcting them.