Images make websites more engaging, but they can also create SEO challenges. Large file sizes slow page loading, missing alt text reduces accessibility and search visibility, and broken images harm user experience. Semrush, one of the most widely used SEO platforms, provides several tools that help identify and resolve these issues. While Semrush does not compress or edit images directly, it audits your website to reveal image-related problems and offers recommendations to fix them. This article explains how Semrush helps optimize images for SEO and how to use its features effectively.
How AAMAX.CO Uses SEO Tools to Improve Image Performance
SEO platforms reveal problems, but expertise is needed to turn insights into results. AAMAX.CO is a full-service digital marketing company offering Web Development, Digital Marketing, and SEO services worldwide, and their specialists use tools like Semrush to audit image performance, prioritize fixes, and implement improvements. Because they also provide web development, they can compress assets, implement modern formats, configure lazy loading, and optimize delivery directly. Their SEO services ensure images enhance user experience and support stronger rankings rather than slowing sites down.
Why Image SEO Matters
Images influence SEO in several ways. They affect page speed, which is part of Core Web Vitals and user experience. Alt text helps search engines understand image content and improves accessibility for visually impaired users. Optimized images can appear in Google Image Search and visual search features, creating additional traffic opportunities. Poorly optimized images, on the other hand, can slow down pages and reduce engagement.
Using the Semrush Site Audit Tool
The Site Audit tool is the primary way Semrush helps with image optimization. It crawls your website and identifies technical issues, including many related to images. After running an audit, you can filter results to focus on image-specific problems. Common issues flagged include:
- Missing alt attributes: Images without alt text that search engines and screen readers cannot interpret.
- Broken internal images: Images that fail to load due to incorrect URLs or deleted files.
- Broken external images: Linked images from other domains that no longer work.
- Large page sizes: Pages with heavy resources that may include oversized images.
- Uncompressed or unminified resources: Files that could be optimized for faster loading.
Each issue includes an explanation of why it matters and guidance on how to fix it.
Identifying Missing Alt Text
Missing alt text is one of the most common image SEO problems. Semrush lists all pages containing images without alt attributes, allowing you to prioritize fixes. When adding alt text, describe the image accurately and concisely, include relevant keywords naturally where appropriate, and avoid stuffing multiple keywords. Decorative images can use empty alt attributes so screen readers skip them.
Finding and Fixing Broken Images
Broken images create a poor user experience and signal neglected maintenance. Semrush identifies broken internal and external images so you can replace or remove them. Fixing these issues ensures pages display correctly and maintain credibility with both users and search engines.
Core Web Vitals and Page Speed Insights
Semrush's Site Audit includes a Core Web Vitals report that integrates performance data. Images often play a major role in Largest Contentful Paint, which measures how quickly the main content of a page loads. If a large hero image loads slowly, it can harm this metric. Semrush highlights pages with poor performance, helping you identify where image optimization could have the greatest impact.
Recommendations typically include compressing images, serving modern formats like WebP or AVIF, specifying image dimensions to prevent layout shifts, and lazy loading below-the-fold images.
Using the On-Page SEO Checker
Semrush's On-Page SEO Checker provides page-level recommendations for improving rankings. While it focuses on content, keywords, and technical factors, it can suggest adding relevant keywords to image alt attributes and improving content elements that support image relevance. This helps align images with the target keywords of each page.
Tracking Image Pack Rankings
Semrush's Position Tracking and keyword research tools can show when images appear in search result features such as image packs. Monitoring these features helps you identify opportunities where optimized images could earn additional visibility. If competitors appear in image packs for your target keywords, optimizing your images may help you capture that space.
Competitive Analysis for Visual Content
By analyzing competitors' pages and SERP features, Semrush can reveal how visual content contributes to their rankings. Understanding which types of images, infographics, or visual assets competitors use helps you create stronger visual content strategies.
Best Practices to Apply After a Semrush Audit
Once Semrush identifies image issues, apply these best practices:
- Compress images using tools or CMS plugins before uploading.
- Use modern formats such as WebP or AVIF.
- Write descriptive, keyword-relevant file names.
- Add meaningful alt text to all informative images.
- Specify width and height attributes to prevent layout shifts.
- Implement lazy loading for images below the fold.
- Use responsive images with srcset for different screen sizes.
- Serve images through a content delivery network.
- Include images in XML sitemaps where appropriate.
Scheduling Regular Audits
Image issues can reappear as new content is added. Semrush allows you to schedule recurring site audits and track progress over time. Regular monitoring ensures new images are optimized and prevents performance regressions.
Conclusion
Semrush optimizes images for SEO by identifying problems such as missing alt text, broken images, heavy pages, and performance issues affecting Core Web Vitals. Although it does not edit images directly, its audits and recommendations provide a clear roadmap for improvement. By acting on these insights and following image optimization best practices, website owners can improve page speed, accessibility, and visibility in both standard and image search results.
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