Fix Google Indexing & Visibility

My website underwent significant updates recently and since then its presence on Google has almost vanished. Core on-page items—meta tags, schema markup, targeted keywords, Search Console submission and page-level optimisation—have all been covered, yet impressions remain close to zero.

The task is to uncover the real technical blocker and resolve it, not to hand me another boiler-plate audit. I will share the URL privately as soon as I know you can dive straight into crawl diagnostics, index status, possible penalties, rendering issues or anything else that could be suppressing rankings.

Tell me, in just a few lines, what you would inspect first and reference one or two projects where you have successfully lifted a site from a similar indexing slump. I expect you to implement the recommended fixes yourself, confirm they are live, and show measurable recovery inside Google Search Console.

Deliverables:
• Root-cause report pointing to the exact visibility issue
• Implementation of the corrective actions (server, code or content level)
• Post-fix verification with Search Console screenshots showing improved coverage and impressions

If you have hands-on experience troubleshooting after major site changes, this should be straightforward.