How to check text for SEO: tools and metrics

Checking SEO text uses 5 key metrics: uniqueness, keyword stuffing, filler words, readability, intent match. No tool replaces manual review — they only flag potential issues.

5 metrics

1. Uniqueness — Copyscape, 85%+.
2. Keyword density — SEO tools, each keyword ≤2%.
3. Filler words — Hemingway Editor, clean writing.
4. Readability — Flesch Reading Ease 60+.
5. Intent match — manually compare with top-10 Google.

2026 addition: AI detection

• GPTZero, Originality.ai detect AI generation.
• Accuracy 60–70%, false positives possible.
• Google doesn't penalize AI directly, but penalizes low quality.