Common Grammar Mistakes That Hurt Your SEO Rankings

Grammar quality directly impacts search rankings. Poor grammar damages readability scores, increases bounce rates, and signals low-quality content to search engines. When readers encounter grammar errors, they lose trust and are more likely to leave—a signal that hurts rankings.

Common Grammar Mistakes

Subject-verb agreement errors occur when the subject and verb don’t match: “The team are playing” should be “The team is playing.” Comma splices join two independent clauses with only a comma. Run-on sentences combine multiple clauses without proper punctuation. Misplaced modifiers create confusion about what the sentence means. Each of these errors reduces readability and signals poor quality.

How Grammar Affects Rankings

Readability metrics directly influence SEO performance. Grammar errors lower readability scores. When content is harder to read, users spend less time on the page and bounce—both negative signals for rankings. Grammar also affects how search engines parse and understand your content. Proper grammar helps search engines correctly identify key concepts.

Correcting Mistakes

Grammarly is the most popular grammar checking tool. The Hemingway Editor highlights complex sentences and suggests simplifications. ProWritingAid provides detailed analysis of grammar, style, and readability. For subject-verb agreement, identify the true subject and match the verb accordingly. For comma splices, use a semicolon or create two separate sentences.

Proofreading Best Practices

Use grammar checking tools first. Read your content aloud—you’ll catch errors your eyes miss. Read backward, sentence by sentence, to focus on grammar. Take a break before proofreading; fresh eyes catch more errors. Have someone else read your content for a second perspective.