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Alternate text (Alt text) is a text description that can be added to an image's HTML tag on a Web page. It is used when the image in the Web page cannot be displayed, in which case the Alt text is shown instead. It is also displayed when a user mouses over the image. Alt text is one of the important attributes required by the image tag. Proper implementation of Alt text can help increase Web accessibility. Alt text is also very important for search engines, which cannot determine the content of images, and must rely on Alt text to determine their contents.
Alt text can be represented in two ways:
The functions of Alt text are:
The following recommendations apply to using Alt text :