Take the Trouble to Label Images

More on demonstrating expertise on other sites with care: after advising someone to offer text alternatives for images I jumped on a chance to comment on a related blog post in detail… Problem: the blog has moved — in haste I missed the date in my feed reader and on the page. And since the comment hasn’t been approved and may never be…

Labeling images and offering text alternatives is not only good for search traffic generation it’s also best practice for accessibility… It offers people using screen readers an insight into images on your pages because the reader can read the text.

Years ago when there was more weight attached to alt text (i.e. text to display when images are turned off coded as alt=”relevant keywords”) for images we used to suggest using image descriptions to improve keyword density without making your content read like keyword spam.

This technique was abused by people who loaded image alt text tags with unrelated keywords. And, as with meta descriptions and meta keywords content, search engines stopped attached any ranking weight to it.

But adding appropriately keyword-rich text/labels still has value in the image search context and also in context of universal or blended search (where search engines show web page, video and image search results together). As Deb says, making it easier for search engines to understand what your images represent will pay search visiblity dividends.

Best practice:

• do a quick check for popular keywords related to your image (Google Adwords free external keyword tool is perfect for this)
• name the image file using popular keywords separating individual word with a hyphen — popular-keywords.jpg or popular-keyword.gif. (Search engines will identify keywords in merged names and when you use underscores, which they don’t recognise as breaks, but creating a space between individual words with hyphens is worth the effort — as it is in URLs*.)
• give images alt text (alt=”popular keywords”)and title tag (title=”popular keywords”) that include — you guessed it — popular keywords.

Note: most content management systems and blogging platforms offer fields to enter this data as you upload an image file; use them.

Attention to this little detail — even if you skip the keyword research step when keyword choices are obvious — can amke quite a big difference to your blog/site’s chances of getting search traffic.

* There is continuing debate about the value of keywords in URLs but many CMSs now offer control of the URL so why not attend to this little detail too?