SEO errors by cause
Clustering and fixing SEO errors by cause
12 cause clusters for technical SEO errors: symptoms, checks, fixes and matching CMS-specific error pages.
Several symptoms attributed to a common cause
Missing titles, duplicate headings and false canonicals can come from a single template at the same time. Start with the time of the change and the affected page types. If only one component stands out, its output is a more targeted entry than a global CMS transition.
Choose the cause as a working hypothesis and compare it to an inconspicuous URL. Document a change and then recheck the same URL set. Thus, it remains comprehensible whether the source has really been corrected or only a single symptom has disappeared.
Template rules
31 matching error types: A template generates the same technical error for many URLs, such as incorrect canonicals, missing H1 or empty meta data.
Plugin conflicts
53 matching error types: Multiple plugins, apps or extensions write the same SEO signals and generate contradictory outputs.
Theme and page builder output
37 matching error types: Visual builders, theme snippets or design components generate HTML that is incomplete or contradictory for search engines.
Cache and CDN Rules
31 matching error types: caching, CDN, edge rules or minification deliver old, blocked or technically modified pages.
Server and header configuration
32 matching error types: HTTP status, X-Robots tag, security header or forwards are wrongly set on the server side.
Sitemap generator
35 matching error types: Sitemap plugins, core sitemaps or shop sitemaps deliver URLs that are not indexable, redirected or obsolete.
Relaunch and migration residues
46 matching error types: After relaunch, domain change or CMS migration, old URLs, canonicals, redirects and internal links remain in the system.
URL parameters and filters
34 matching error types: Filters, sorts, tracking parameters or variants generate indexable duplicates and crawl budget problems.
Internationalization and Hreflang
21 matching error types: Language and country versions are incorrectly linked, not mutually confirmed or collide with canonicals.
Media and image processes
29 matching error types: Image sizes, alt texts, lazy loading or media URLs are not maintained consistently or technically delivered incorrectly.
JavaScript and performance budget
11 matching error types: Too much JavaScript, blocking resources or client-side rendering worsen crawlability and core web vitals.
Shop and product data
47 matching error types: Product status, variants, categories, prices or availability generate SEO errors on many shop URLs simultaneously.