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SEO Tips for Image Formats and Sizes in 2024

Importance of Image Optimisation

Image optimisation is crucial for enhancing website performance and user experience, which directly impacts SEO rankings. Properly optimised images can improve page load times, reduce bounce rates, and boost user engagement.

Preferred Image Formats

1. WebP:

  • Efficiency: WebP images are significantly smaller in size compared to JPEG and PNG formats, without compromising on quality.
  • Support: Most modern browsers support WebP, making it an excellent choice for a balance between quality and performance.

2. SVG:

  • Scalability: SVG images are resolution-independent, meaning they scale perfectly on any device without losing quality.
  • File Size: SVG files are typically smaller than raster images, especially for icons and simple graphics, reducing load times.

Keeping Image Sizes Small

1. Compression:

  • Tools: Use image compression tools, or built-in features in design software to reduce file sizes without losing quality.
  • Automation: Implement automated image optimisation plugins for CMS platforms.

2. Dimensions:

  • Appropriate Sizing: Ensure images are not larger than necessary for their display size on the website. Resize images to the exact dimensions required before uploading.
  • Responsive Design: Use responsive images and test images on verious screen sizes and browsers to check for mobile compatibility and speed.

3. Lazy Loading:

  • Technique: Implement lazy loading to delay the loading of images until they are about to enter the viewport, improving initial page load times.

Benefits of Next-Gen Formats

  • Faster Load Times: Smaller image sizes lead to faster page loads, which is a critical factor for SEO as search engines prioritise websites that load quickly.
  • Better User Experience: Faster websites provide a better user experience, reducing bounce rates and increasing the time visitors spend on the site.
  • Improved Mobile Performance: With the increasing number of mobile users, optimised images ensure quick loading times and efficient use of bandwidth on mobile devices.

Practical Tips for Implementation

  • Audit Existing Images: Regularly audit your website’s images to identify opportunities for optimisation. Replace outdated formats with WebP or SVG where appropriate.
  • Use Modern Formats by Default: When adding new images, always use WebP for photos and SVG for graphics, logos and icons.
  • Monitoring and Maintenance: Continuously monitor website performance using tools like Google PageSpeed Insights or Lighthouse and adjust image strategies as needed.

By focusing on these SEO tips related to image formats and sizes, you can ensure that your website is optimised for both performance and search engine rankings, providing a better experience for your users.