More and more people are searching for images over the Internet. This results into tons of untargeted traffic that means more spam, more pain for servers and no benefit at all.
The thing is most popular search engines (including Google) is text-based. It won’t know that your image is about flowers if you call it apple.jpg, use “apple” in the alt text or just tell something about apples in the text located near the image.
Therefore there are still so many confusing images in Google search results.
But there’s a good solution to make Google’s image search bot’s job easier: this tip was mentioned in the recent Vanessa Fox’s post on image optimization:
It is recommended to block non-content images (purely descriptive) for two reasons:
- To exclude them from search results;
- To save crawler’s time that will discover something useful instead of that.
To block non-content images you should:
- Place them in a separate folder from your content images
- Block that folder using robots.txt.
For instance, if you place these images in a folder called no_index_images, your robots.txt file would contain:User-agent: *Disallow: /no_index_images/
Any other image optimization tips?