WordPress powers 43% of the web, yet the default installation ships with at least 5 active SEO issues from day one - duplicate archives, missing canonical tags, incomplete XML sitemaps, indexed thin content, and mixed HTTP/HTTPS content. These WordPress SEO issues produce no visible errors, but they erode organic traffic slowly and steadily. This guide diagnoses 10 concrete problems and provides the exact fix for each.
The checks below have been tested on WordPress 6.x with RankMath SEO, on projects delivered by Creative Side.
1. Index Bloat - Too Many Pages in Google
WordPress generates archives by default for authors, dates, tags, and formats that contain no unique content - and Google indexes all of them. A site with 50 posts can have 300+ indexed URLs due to these duplicate archives.
Diagnosis
Search Google for: site:example.com and count the results. If you have 3-5 times more indexed URLs than actual content pages, you have index bloat.
What to Deindex
| Archive Type | Why It's a Problem | RankMath Solution |
|---|---|---|
| Author archives (single-author site) | Duplicate of the blog | RankMath → Titles & Meta → Authors → "Author Archives" = Disabled |
| Date archives | Zero unique value, duplicate posts | RankMath → Titles & Meta → Misc → "Date Archives" = Disabled |
| Tag archives (without strategy) | Thin content, 1-2 posts per tag | RankMath → Titles & Meta → Tags → "Tag Archives" = No Index |
| Format archives (aside, gallery) | Unused, generated by default | RankMath → Titles & Meta → Misc → "Format Archives" = Disabled |
| Media attachment pages | One page per image, zero content | RankMath → General Settings → Links → "Redirect Attachment URLs" = On |
Real-World Impact
We cleaned up index bloat on a WordPress blog with 120 posts that had 780 indexed URLs. After deindexing useless archives, indexed URLs dropped to 145. Organic traffic increased by 23% within 8 weeks - Google allocated crawl budget toward the pages that matter.
2. Canonical Issues - Internal Duplicate Content
WordPress can serve the same page on multiple URLs - with/without www, with/without a trailing slash, with sorting or pagination parameters - and without correct canonical tags, Google dilutes authority across variants. The fix: verify that RankMath sets correctly on every page, implement a 301 redirect from www to non-www (or vice versa) in .htaccess, and ensure that pagination uses self-referencing canonicals (page 2 points to itself, not to page 1). For a comprehensive guide on duplicate content sources and detailed solutions - canonical tags, noindex, 301 redirects, preventive configuration - see our dedicated article on duplicate content.
3. Thin Content - Pages With No Value
Pages with insufficient content - tags with 1-2 posts, categories without descriptions, articles under 300 words - are identified by Google as thin content and rarely indexed. Identify them through Google Search Console (Pages → "Crawled - currently not indexed") or Screaming Frog (filter by Word Count under 300). Solutions: consolidate similar thin articles into a comprehensive piece with 301 redirects, add useful content to category pages, set noindex on functional pages with no SEO purpose, or delete pages that serve no purpose with proper redirects. Thin content frequently overlaps with duplicate content issues - for detailed canonicalization and consolidation strategies, see our guide on duplicate content and SEO.
4. Missing or Incorrect Schema Markup
Correct schema markup is the prerequisite for rich snippets in Google - review stars, expandable FAQs, breadcrumbs, product prices. 70% of WordPress sites either lack schema markup entirely or have errors that invalidate everything.
What Each Page Type Needs
| Page Type | Required Schema | Generator |
|---|---|---|
| Homepage | Organization / LocalBusiness | RankMath automatic |
| Blog post | Article + BreadcrumbList | RankMath automatic |
| Service page | Service / ProfessionalService | RankMath manual (Schema tab) |
| WooCommerce product | Product + Offer + AggregateRating | WooCommerce + RankMath |
| FAQ | FAQPage | RankMath FAQ block |
| Contact | LocalBusiness + ContactPoint | RankMath manual |
Validation
Test each page type with the Google Rich Results Test. Common errors: missing required fields (image, priceValidUntil, author), duplicate schema (SEO plugin + theme both generating it), malformed JSON-LD.
Is your WordPress site experiencing declining organic traffic and you don't know why? Request a technical SEO audit from Creative Side - diagnosis with priorities and impact estimates.
5. Broken Internal Links
Broken internal links (404s) leak PageRank, frustrate users, and signal neglect to Google. On a WordPress site with 200+ pages and 3+ years of age, the probability of having 20-50 broken internal links is nearly 100%.
Causes
Diagnosis and Fix
Rule: Any URL that has ever existed on your site and has been indexed or has backlinks must be redirected, not deleted. A 404 loses all accumulated authority. A 301 transfers it.
6. Slow Pages That Consume Crawl Budget
Google allocates a limited crawl budget to each site - the number of pages it accesses within a given period. Slow pages (TTFB > 1s) consume more of this budget and reduce crawling frequency for important pages.
Concrete Impact
According to data from Google Search Console (Settings → Crawl Stats), a site with an average TTFB of 2s is crawled 3-5 times less frequently than one with a TTFB of 300ms. For an online store with 5,000 products, this means new products are indexed in 2-3 weeks instead of 2-3 days.
Solution
Speed optimization has a direct impact on SEO, not just UX. See the complete WordPress site optimization guide for detailed techniques - hosting, caching, images, database.
7. XML Sitemap Errors
The XML sitemap is the map you submit to Google. Common errors: it includes noindex URLs, includes URLs with 301 redirects, is missing important pages, or the sitemap exceeds 50,000 URLs without being split into fragments.
Verification
example.com/sitemap_index.xmlRankMath generates the sitemap automatically and excludes noindex pages. But verify manually - caching plugins can serve an outdated version of the sitemap.
Submitting to Google
Google Search Console → Sitemaps → add sitemap_index.xml. Monitor "Discovered - currently not indexed" - if it grows, you have content quality issues.
8. Mixed Content (HTTP/HTTPS)
After migrating to HTTPS, resources loaded over HTTP (images, scripts, fonts) generate "mixed content" warnings that block the browser's green padlock and can affect rankings.
Diagnosis
wp search-replace 'http://example.com' 'https://example.com' --dry-run - verify before executingCommon Sources
Warning: Do not use sed for replacements in the WordPress database - it breaks serialized data. Use wp search-replace which handles serialization correctly.
9. Redirect Chains
A redirect chain occurs when URL A redirects to B, which redirects to C, which redirects to D. Each hop adds 100-300ms of latency and dilutes PageRank by approximately 10%. Google follows a maximum of 10 hops, then gives up.
Causes in WordPress
Fix
10. Images Missing the Alt Attribute
Missing alt text affects SEO in three ways: Google cannot index the image in Google Images, you lose semantic context on the page, and accessibility suffers - which is an indirect quality signal.
Verification
Screaming Frog → Images → filter "Missing Alt Text". On a typical WordPress site with 500+ images, 30-50% lack alt text.
Best Practices
alt="" (empty, not missing) for purely decorative imagesFrequently Asked Questions
How do I find out if my WordPress site has SEO issues?
The quickest diagnosis: check Google Search Console → Pages. If you have pages in "Crawled - currently not indexed" or "Discovered - not indexed", Google considers the content insufficiently valuable. For a complete audit, use Screaming Frog (free up to 500 URLs) which automatically identifies broken links, redirect chains, thin content, images without alt text, and schema errors.
How long does it take to see results after fixing SEO issues?
Resolving technical SEO issues takes 2-8 weeks to reflect in organic traffic. Indexation fixes (noindex, canonical, sitemap) take effect within 1-2 weeks. Cleaning up index bloat and consolidating thin content requires 4-8 weeks. Recovering from an algorithmic penalty can take 3-6 months.
RankMath or Yoast SEO?
Both solve the same core problems (sitemap, canonical, schema, meta tags). RankMath offers more features in the free version (advanced schema, redirect manager, analytics integration). Yoast was the standard for a decade, but the free version has remained limited. Do not install both simultaneously - they generate schema and canonical conflicts.
Next Step
Technical SEO issues do not resolve themselves - they compound. Every day with index bloat, broken links, or thin content costs you organic positions that your competitors are winning.
A professional technical SEO audit identifies all issues, prioritizes them by impact, and delivers a clear implementation plan. Creative Side delivers actionable audits, not decorative PDFs.
Request a technical SEO audit - complete diagnosis with a prioritized action plan
