freecourses.digital
Lesson progress: 0 of 3 activities done
All lessons in Technical SEO Auditing Lesson 12.4 of 84

Module 1: Introduction to Technical SEO Auditing

  1. 1.1What Is a Technical SEO Audit?
  2. 1.2Technical SEO Audit vs. General SEO Audit
  3. 1.3When Should You Audit a Website?
  4. 1.4Types of Technical SEO Issues
  5. 1.5Defining Audit Scope and Objectives

Module 2: Website Crawling and URL Discovery

  1. 2.1How SEO Crawlers Discover URLs
  2. 2.2Configuring a Website Crawl
  3. 2.3Crawl Scope, Limits, and Exclusions
  4. 2.4Internal Links and Crawl Depth
  5. 2.5Orphan Pages and URL Discovery
  6. 2.6Crawl Data vs. Search Engine Data
  7. 2.7Identifying Crawl Coverage Gaps

Module 3: HTTP Status Codes and Redirect Auditing

  1. 3.1Understanding HTTP Status Codes
  2. 3.2Finding 4xx Errors and Broken Links
  3. 3.3Identifying 5xx Server Errors
  4. 3.4Redirect Chains and Redirect Loops
  5. 3.5Internal Links to Redirected URLs
  6. 3.6301 vs. 302 Redirects
  7. 3.7Auditing 404 Pages and Soft 404s

Module 4: Crawlability and Indexability Auditing

  1. 4.1Crawling vs. Indexing
  2. 4.2Robots.txt Audit
  3. 4.3Meta Robots and X-Robots-Tag
  4. 4.4Noindex and Canonical Conflicts
  5. 4.5XML Sitemap Validation
  6. 4.6Canonical URL Auditing
  7. 4.7Identifying Indexability Conflicts
  8. 4.8Comparing Crawl Data with Google Search Console

Module 5: URL Structure and Duplicate Content Issues

  1. 5.1URL Structure and Normalization
  2. 5.2Duplicate URLs and Duplicate Pages
  3. 5.3HTTP vs. HTTPS and Hostname Variations
  4. 5.4Trailing Slashes and URL Parameters
  5. 5.5Pagination and Faceted Navigation
  6. 5.6Canonicalization Strategies
  7. 5.7Internal Linking to Preferred URLs

Module 6: Technical On-Page Auditing

  1. 6.1Missing and Duplicate Title Tags
  2. 6.2Missing and Duplicate Meta Descriptions
  3. 6.3Missing, Duplicate, and Multiple H1 Headings
  4. 6.4Heading Hierarchy and HTML Structure
  5. 6.5Missing Image Alt Attributes
  6. 6.6Internal Link and Anchor Text Issues
  7. 6.7Empty, Thin, and Near-Duplicate Pages
  8. 6.8Auditing HTML Metadata at Scale

Module 7: Website Performance and Core Web Vitals

  1. 7.1Core Web Vitals: LCP, INP, and CLS
  2. 7.2Lab Data vs. Field Data
  3. 7.3Identifying Slow Pages
  4. 7.4Image and Resource Optimization Opportunities
  5. 7.5JavaScript and CSS Performance
  6. 7.6Mobile Usability and Responsive Rendering
  7. 7.7Prioritizing Performance Fixes

Module 8: JavaScript SEO and Rendering

  1. 8.1How Search Engines Process JavaScript
  2. 8.2HTML Source vs. Rendered HTML
  3. 8.3Client-Side vs. Server-Side Rendering
  4. 8.4JavaScript-Generated Content and Links
  5. 8.5Rendering Failures and Missing Content
  6. 8.6Lazy Loading and Crawl Accessibility
  7. 8.7Diagnosing JavaScript SEO Problems

Module 9: Structured Data and Schema Auditing

  1. 9.1Structured Data and Schema.org Basics
  2. 9.2JSON-LD and Structured Data Formats
  3. 9.3Finding Structured Data Across a Website
  4. 9.4Detecting Invalid or Incomplete Markup
  5. 9.5Schema Validation and Rich Result Eligibility
  6. 9.6Conflicting or Duplicate Structured Data
  7. 9.7Prioritizing Schema Fixes

Module 10: Analyzing Audit Data and Prioritizing Issues

  1. 10.1Reading Crawl Reports and Exports
  2. 10.2Grouping URLs by Issue Type
  3. 10.3Identifying Root Causes vs. Symptoms
  4. 10.4Evaluating Severity, Impact, and Effort
  5. 10.5Separating Sitewide and Isolated Issues
  6. 10.6Identifying False Positives
  7. 10.7Building an Actionable Issue Register

Module 11: Technical SEO Audit Reporting

  1. 11.1Structuring a Technical SEO Audit Report
  2. 11.2Documenting Evidence and Affected URLs
  3. 11.3Writing Developer-Ready Recommendations
  4. 11.4Mapping Issues to Business and Search Impact
  5. 11.5Creating a Prioritized Remediation Roadmap
  6. 11.6Presenting Findings to Stakeholders
  7. 11.7Tracking Fixes and Ownership

Module 12: Fix Verification and Technical QA

  1. 12.1Re-Crawling After Fixes
  2. 12.2Comparing Before-and-After Crawl Results
  3. 12.3Verifying Redirects, Canonicals, and Indexability
  4. 12.4Detecting Regressions and Newly Introduced Issues
  5. 12.5Testing Website Changes Before Deployment
  6. 12.6Confirming Fixes with Search Console and Other Evidence
  7. 12.7Closing Audit Findings and Recording Results

Detecting Regressions and Newly Introduced Issues

Your roadmap for this lesson

  • What a regression is in technical SEO
  • Where regressions usually come from
  • How to detect them with crawls and alerts
  • How to trace a regression to its cause

Short answer

An SEO regression is a problem introduced or reintroduced by a change, such as a fix that breaks another template or a release that restores old noindex tags. Detect regressions with full crawl comparisons, scheduled crawls, and Search Console and uptime alerts, then match the issue's first appearance to release dates to find the cause quickly.

A Bacolod restaurant group fixed its duplicate titles in June. In August, a theme update reset the title template. Nobody noticed until October, when the next audit found 600 duplicate titles again. The fix was fine. The monitoring was missing.

Two kinds of regressions

  • Side effects: a fix breaks something else. Example: a redirect rule for trailing slashes also redirects image URLs.
  • Reopened issues: a later change undoes a fix. Example: a plugin update restores noindex on a post type.

How to detect them

  1. Full crawl comparison after each roadmap phase (Lesson 12.2). Look at new and increased issues, not just fixed ones.
  2. Scheduled crawls with saved settings, compared automatically to the previous run.
  3. Alerts:
    • Search Console emails for indexing and enhancement issues
    • Uptime monitoring for 5xx errors
    • Change monitoring on key pages: robots.txt, canonical, noindex, titles
  4. Search Console trends: sudden changes in indexed pages, impressions, or Crawl Stats.

Tracing the cause

Find the first date the issue appeared (scheduled crawl history or Search Console). Match it to the release log: deployments, plugin updates, CMS changes, CDN settings. The overlap usually points straight at the cause.

Practice: side effect or reopened issue?

Sort each item into the right group.

  • New slash redirect rule also redirects CSS files

  • Plugin update restores noindex on locations

  • Canonical fix on products breaks category canonicals

  • Theme update resets title template

Common mistakes

  • Only checking whether fixed issues went down.
  • No release log, so causes are guesswork.
  • No monitoring between audits.
1. What is an SEO regression?
2. Best way to find a regression's cause?
3. What should crawl comparisons check besides fixed issues?

Your action

Next, you will test website changes before deployment.

Key terms

Regression
A previously working element that breaks after a change.
Reopened issue
A fixed finding that returns, often after a deployment or plugin update.
Scheduled crawl
An automatic crawl run on a set schedule to monitor technical health.
Release log
A list of deployments and updates with dates, used to trace regressions.

Questions beginners ask

What causes most regressions?

Theme and plugin updates, new templates, migrations, CDN or server changes, and fixes applied with overly broad rules.

How often should scheduled crawls run?

Weekly for active ecommerce and news sites, monthly for small business sites, plus after every major release.

Which alerts help?

Search Console email alerts, uptime monitoring, and change monitoring tools that watch robots.txt, titles, canonicals, and noindex on key pages.

Should regressions go in the issue register?

Yes, as new rows linked to the change that caused them, or reopen the original row if it is the same issue.

Related lessons

Want someone to handle SEO for your business while you learn? The team at Remar Digital can help.