Historically Google and other search engines have found it very difficult to understand the content of an image.
While Google is getting better at understanding images on the web, you are far better off making it clear to search engines what your images are about, for the best chance of your images appearing in image search and supporting rankings for the whole page.
- Used by search engines to better understand what an image is about
- Use your keywords as alternate text
- If you have multiple images on the same page, try not to use identical Alt Text, but something more descriptive to each image (eg. ‘black mens dress shoes’ and ‘brown mens dress shoes’)
Image File Name
- In the images file name use your target keywords separated by hyphens (eg. ‘steel-toe-workboots.jpg’)
Files Size and Format
- Try to use high quality images that don’t blur or stretch on different screen sizes
- Use an image format that is widely accepted (eg. JPG, GIF, PNG)
- Larger files sizes will affect page load times, so try to reduce file sizes as much as possible without affecting resolution.
- TinyPNG is a great tool for this