What's the difference between image alt text, title text, and file names?

Learn how to optimize each one for search.

Optimized image alt text (also referred to as alternative text), image title text, and image file names are all part of good image optimization.

But what is the difference between the image alt text and title?

Do you keep them the same? Do you make them all different?

In this post, you’ll learn about the differences between the image alt attribute, image title text, and image file name, and find recommendations on how to better optimize them for search.

Alt Text vs. Alt Tag: Which Is Correct?

When you think of image alt text, the term that may immediately come to mind is “alt tag.”

Well, the alt tag is really a misnomer and doesn’t exist at all. Alt text, or alternative text, is the alternate text attribute of the image tag.

What is Image Alt Text?

Alt text, or alternative text, is used to display text that describes an image to “alternative” sources.

Primarily, its goal is to make images more accessible to the blind who use screen readers, to make the web much more accessible per W3C accessibility guidelines.

It lets you specify an image description that is fed through an audio-based prompter, which tells people with low or no vision what is currently on the page.

The secondary goal for alt text is to describe the image for people who have decided, for whatever reason, to turn off images in their web browser application.

In addition, it satisfies those user agents who are also unable to “see” the images.

As a rule, alternative text should include targeted keyword optimization in a context that describes what the image is about. If no alternative text exists for the image, it will be displayed as an empty image.

Because Google cannot exactly crawl images in-depth, Google uses alternative text as a focus when they are trying to understand what the image is about.

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