Per-system signature diagnosis
Panda demoted thin-content sections specifically (section-wide modification factor per Google Patent 8,682,892, granted March 2014). HCS demotes the entire site evenly (sitewide weighted classifier from August 18, 2022, distributed across core systems after March 5, 2024). Reviews System demotes review-content pages specifically. Penguin pre-4.0 demoted aggressive-anchor pages; post-September 23, 2016 it zero-weights manipulative links rather than demoting. Different signatures, different remediation. Restore reads the signature before writing the scope.
Reconsideration-request authoring that survives review
Google's reconsideration review requires three elements: exact quality issue identified, specific steps taken with per-URL evidence, outcome documentation. Common rejection causes — partial remediation across only a subset of affected pages, blind disavow without removal-outreach documentation, vague rebuilding language — are diagnosable and avoidable. Restore writes reconsideration requests that match the structure Google's review team needs to approve.
Multi-year algorithm-update history depth
Recovery shape depends on which update did the demoting and when. Panda iteration dates pre-2015 (4.0 May 20, 2014; 4.2 rollout starting July 18, 2015) versus post-2015 continuous integration. Penguin 4.0 (September 23, 2016) shifting from sitewide demotion to per-link discounting. HCS (August 18, 2022) versus its March 5, 2024 distribution into core systems. May 5, 2024 site-reputation-abuse enforcement. The audit uses this history as the diagnostic substrate — not a generic SEO checklist.