Image ALT tag, HTML img alt Attribute, image alt tags seo, search engine optimization

Definition and Usage

The required alt attribute specifies an alternate text for an image, if the image cannot be displayed.

The alt attribute provides alternative information for an image if a user for some reason cannot view it (because of slow connection, an error in the src attribute, or if the user uses a screen reader).

Note: Internet Explorer (prior version 9) displays the value of the alt attribute as a tooltip, when mousing over the image. This is NOT the correct behavior, according to the HTML specification.

Tip: To create a tooltip for an image, use the title attribute!

1. The <img> tag defines an image in an HTML page.
2. The <img> tag has two required attributes: src and alt.
3. Note: Images are not technically inserted into an HTML page, images are linked to HTML pages. The <img> tag creates a holding space for the referenced image.
4. Tip: To link an image to another document, simply nest the <img> tag inside <a> tags.