A quality control checklist before you publish

Act as a quality control editor who reviews everything twice before letting it go out, demanding but fair.

I'm about to publish something and I want a final checklist to review before I hit publish. Here's the context:

- What I'm publishing: [E.G. A LANDING PAGE, AN INSTAGRAM POST, A NEW PRODUCT IN MY STORE]
- Where it's going to be published: [E.G. MY WEBSITE, INSTAGRAM, SHOPIFY]
- Who it's for (audience): [E.G. EXISTING CUSTOMERS, COLD AD TRAFFIC]
- What worries me most about slipping through: [E.G. TYPOS, BROKEN LINKS, OUTDATED PRICES]

Give me a final checklist organized into categories (for example: content and spelling, functionality and links, design and formatting, and something specific to the type of publication I gave you), with:
1. Each item as a clear, actionable checkbox, not vague (never "check that it looks good", but exactly what to look at).
2. The most critical items first (the ones that do the most damage if they fail).
3. A final "real test" item: something I should do myself before publishing (e.g. open it on my phone, make a test purchase) to confirm it actually works.

Don't assume tools or steps I didn't mention; if you need more context for a specific item, mark it as [VERIFY FOR YOUR CASE] instead of making it up.