Diagnosis: Some CMS menus store old URLs or uppercase/trailed variants. Chains waste crawl budget and can drop tracking params.

Fix: Update the source link to the canonical final URL (protocol + host + path), then remove the old redirect where safe.

• Audit with Redirect Checker (look for 301→200 only, no 302/307).
• Normalize to lowercase, single trailing-slash policy, one host (e.g., https://www.example.com/).
• Ensure nav, footer, and XML sitemaps point to the same canonical destinations.

Yes. Mixed signals create duplicate crawl paths and cookie/session issues.

Fix: Choose one (usually https + www), 301 all variants to it, and update every internal link to the canonical host.

• Verify with Headers Lookup (check HSTS and Location chains).
• Update CDN/edge rules and CMS base URL.

If the HTML canonical points to A but you internally link to B, crawlers get conflicting signals.

Fix: Align internal links with the page’s self-referencing canonical. Where variants exist (UTM, sort, tracking), link to the clean canonical.

• Spot HTML vs HTTP header canonicals via Headers Lookup.

Diagnosis: IDs changed or headings are injected after JS.

Fix: Ensure the target element has a unique id present in server HTML (progressive enhancement). Avoid duplicate IDs.

• Confirm target text/IDs exist with Text Extractor.

Often unreliable. Crawlers prefer semantic anchors.

Fix: Use a real <a href> with an actual URL. Enhance with JS if needed, but keep the path crawlable and accessible.

Generally, no. Nofollow on internal links can cut discovery.

Fix: Use standard followed links for indexable destinations. Reserve nofollow for login/cart or untrusted user-generated paths.

Pagination: Self-canonicalize each page in the series; link to page 1, a few neighbors, and last if useful.

Facets: Link only to representative filtered states with unique value (inventory, geography, use-case). Others: noindex,follow and exclude from sitemaps.

Within a locale, link to same-locale URLs. Cross-link alternates in hreflang, not primary copy, unless user explicitly switches locale.

• Each locale page references all alternates (including itself) and keeps a locale-self canonical.

OK for supporting docs; risky as primary destinations.

Fix: Prefer an HTML landing page that links to the file. Control indexing via X-Robots-Tag on files where needed.

• Inspect with Headers Lookup (check X-Robots-Tag).

Not if they’re plain HTML. Performance issues usually come from heavy JS/nav megamenus.

Fix: Keep TTFB < 600 ms and payload < 2 MB; server-render nav and lazy-load non-critical menus.

• Measure with TTFB Checker & Page Size Checker.