Dynamic content on your page (like ads, embedded widgets, or dynamically loaded images) doesn't have reserved space, causing layout shifts when it loads. This negatively impacts your Cumulative Layout Shift (CLS) score.
Dynamic content that loads without predefined dimensions, causing page elements to shift.
Reserve space for dynamic content using CSS or placeholder elements with known dimensions.
<div class="ad-placeholder" style="width: 300px; height: 250px;">
<!-- Dynamic ad content loads here -->
</div>Reserving space prevents unexpected layout shifts, maintaining a stable visual experience and improving CLS scores.
This issue can affect your site's search engine rankings and user experience. Addressing it promptly helps ensure optimal performance and visibility in search results.
Black SEO Analyzer automatically checks for this warning during site analysis, along with hundreds of other technical SEO issues.
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