Search Engine Image Optimisation
Most clients don’t see any difference between image ALT text and TITLE text, mostly keeping them the same.
is meant to be an alternative information source for those people who have chosen to disable images in their browsers and those user agents that are simply unable to “see” the images….such as Google! Alt text therefore should describe what the image is about and get those visitors interested to see it. So ALT text is vital to Google and other search engines.
should provide additional information and should be relevant, short, catchy and concise. A title offers advisory information about the element for which it is set.
Both tags are primarily meant for visitors (though ALT text seems more important for crawlers) – so provide explicit information on an image to encourage them to view it or get them interested. Include your main keywords in both of them but keep them different. Keyword stuffing in Alt text and Title is still keyword stuffing, so keep them relevant and meaningful.
should also be meaningful. Simply uploading an image from a camera with a file name of DSC00021.jpg will do nothing for you. However if you renamed the image to a meaningful name, without using invalid or illegal characters – including spaces, set the ALT text and TITLE text you will find that search engines will take notice and you page or post will gather even more hits simply because of proper image optimisation.
Don’t use a single word or multiple words together to name your image files. Use dashes ( – ) not underscores ( _ ) or pluses ( + ) to separate the words in the filename as Google sees dashes as word separators, and underscores as joiners so to Google
Large-Red-Bucket = Large Red Bucket
‘Real Life’ example
Your website sells buckets. You are a bucket maestro, you are the place to come to for buckets. But what happens if you don’t apply basic image optimisation techniques to your website? Easy, you get less traffic which equates to less sales.
Imagine you have a product, item number B0001-4367-BRB. It’s a bucket, its red and you just took a photo of it for the web site. The file name probably looks like DSC0267.jpg. So, you may get clever and decide to rename it to bucket.jpg, which admittedly would be an improvement…but then again do a Google search for “bucket” and see what you get!
More to the point what if there is a customer out there that wants a BIG RED BUCKET.
Make it easy for them, name the image Big-Red-Bucket.jpg.
When you add the image to your website ensure you add the ALT text so it describes what you see but what a search engine can’t see…describe it, for example “40cm diameter red plastic bucket with metal handle. Holds 3 gallons.”
And set the title text to something like “Big Red Bucket“.
You now have many more chances of selling b0001-4367-BRB than before!