SEO Mistakes & Best Practices For Images

Google algorithms don't know how to extract information from images as well as for text content.

Sometimes, they try to rely on other sources of information such as links pointing from or to the corresponding page. However, you should not rely on this feature, because when Google has a hard time establishing relevancy, it usually does not index and rank corresponding content. Google algorithms are not good at guessing what you mean or what you want when information is missing.

Implementing SEO for images is slightly different than for text content. Here is what you need to know:

- Google algorithms try to extract relevant information from the HTML ALT and title attributes. These are both considered as a kind of content. They also try to extract information from the text and content surrounding images.
- Algorithms search for keywords in URLs too, therefore an image's filename can provide a lot of relevant information.
- If the content of ALT and title attributes is in German, the image will rank in German search results.
- Google checks the resolution of the image as a quality ranking factor.
- In general, images are crawled less often than text content.
- Canonical links don't work for images (and videos).
- It is possible to index images in sitemaps.
- Compressed images take less time to download and improve user experience.
- Resizing images to proper height and width and setting such values in corresponding img HTML tags saves rendering and loading time, and therefore improves user experience. Compressing images helps too.

SEO For Image Only Webpages

Many artists and photographers like to implement webpages with images only. They insist on not setting any text, because it is part of their style. An extra workaround is available:

- Text which is not immediately visible to users is discounted compared to visible text when establishing relevancy, but it remains relevant.
- One should display hidden text describing the image to the user at the bottom of the page after clicking on it. Such text will be taken into account by Google crawlers for relevancy.

This SEO technique preserves the desire of the artist while creating seo friendly images.