301 maps for every old URL, canonical tags, sitemap submitted, and staging noindex removed — rankings lost at launch take quarters to recover.
Analytics events verified, conversion tracking tested with real submissions, and error monitoring wired — you can't fix the funnel you didn't record.
Every form to its destination inbox/CRM, payments in production mode tested, emails rendering, SSL everywhere, and the 404 page actually helpful.
Vitals checked on real devices, caching verified, DNS TTLs planned, and the previous-version rollback held warm for 48 hours — hope is not a launch strategy.
Skipping the discipline this article describes until an incident, audit, or stalled project forces it — every practice above is cheaper adopted early than retrofitted under pressure.
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