Humans can decipher the contents of an image, but not bots. Search engine bots rely on textual cues to understand website imagery, e.g.: image alt tag. So if you are not leveraging the power of image SEO today, you are leaving something big behind.

On another hand, we have to consider that correctly tagging website image helps with the task of enabling accessibility across your site. Many aspects of optimizing images for SEO have to do with Accessibility and UX.

But let’s go back to SEO observing the ten fundamentals steps to be taken in the following infographic to optimize an image:

Image SEO infographic

Infographic by Digitalico Media

Here’s a summary of the infographic contents:

  1. Alt Tags : screen readers tell blind users what the alt text says. Search engine crawler are like disabled users. They rely on alt tags to understand for the image is about. Describe the images without stuffing keywords
  2. Image File name:
    Give your photos descriptive names, Eg: mountains-of-alaska.jpg rather than IMG5689.jpg
  3. Resize and downsample images to improve speed performance, and specify image dimensions
    Tip: ImageOptim, Jpeg Mini and PunyPNG are three great services to downsample images
  4. Image Captions: this is one more opportunity to describe the image and add context
  5. Responsiveness: Make sure you upload one image for each device you are optimising for, as opposed to delivering a fraction of the image. Your users will appreciate that and your overall UX efforts will improve.
  6. Uniqueness: Spend enough time in producing unique images or bespoke illustrations for your web project. If that’s not feasible, then opt for “Creative Commons Images from Flickr”. Commercial Stock photos should be the last choice
  7. Keep your image close to the textual content of an article vs having the image just in a slider or floating around on its own.
  8. Use Opengraph for Facebook and Pinterest sharing
  9. Use TwittterCards for Twitter sharing
  10. Use an XML image sitemap


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