Top SEO Mistakes to Avoid: Duplicate Content, Meta Tags, Images, Crawlability, Mobile
Identify and fix duplicate content, meta tags, image issues, crawlability, and mobile optimization.
Run Site Audit, fix duplicate content, meta tags, image issues, and crawlability problems.
Summary
The guide lists the most common SEO mistakes that hurt rankings and visibility. Duplicate content can be detected with Semrush Site Audit and fixed with canonical tags or 301 redirects. Under‑optimized meta tags—missing, duplicate, or length violations—should be corrected. Image issues include missing alt text, oversized files, and broken images, all of which slow the site and degrade UX. Slow load speed is confirmed by Site Audit and can be improved by compressing images, minifying code, and enabling caching. Poor crawlability arises from blocked crawlers, broken links, redirect chains, orphan pages, and 4xx/5xx errors; Site Audit helps identify and fix these. Lack of mobile optimization requires responsive design, viewport tags, and avoiding intrusive pop‑ups. Regular use of Site Audit and Google Search Console ensures ongoing health.
Key changes
- Duplicate content detected by Site Audit; fix with canonical tags or 301 redirects.
- Under‑optimized meta tags: missing, duplicate, or length violations; add or edit accordingly.
- Image issues: missing alt text, oversized files, or broken images; add alt, compress, or replace.
- Slow load speed: Site Audit identifies errors, warnings, and notices; fix by compressing images, minifying code, and enabling caching.
- Poor crawlability: blocked crawlers, broken links, redirect chains, orphan pages; resolve via robots.txt and link fixes.
- Lack of mobile optimization: ensure responsive design, viewport tags, and avoid intrusive pop‑ups.
- Use Site Audit to monitor crawlability score and fix identified issues.
- Use Google Search Console for additional error reporting and remediation.