Case Semrush: Does Bold Text Help Your SEO?

1.5%

Increase in Clicks

81%

Statistical Reliability

What?

Research into the impact of bold text on SEO performance in collaboration with Semrush

Google has confirmed that bold text can improve SEO performance because search engines better understand the content. With these insights, we conducted a targeted test with a Canadian software company to measure the effect of bold text on search results.

Testresultaten SplitSignal Vetgedrukte tekst grafiek

How?

Data-driven test with 489 blog pages and careful monitoring of results

We tested 489 blog pages with SplitSignal, bolding important keywords in the content using strong tags. After 28 days, we saw a small improvement of 1.5% in clicks, but not significant enough for definitive conclusions. This shows that the effect of bold text can vary per website.

Tooling

Conclusion and Next Steps

This test confirms that semantic HTML can add value to your content, but the effect varies per website. Our experience shows that it is worth testing this for your website. We continue to investigate this and share new insights in future cases.

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