This property corresponds to the "alt" attribute of an HTML <img> element.
Some browsers may display this text in the form of a tool tip.
Assistive technology used to enable accessibility to Web-based content, such as screen readers, may make use of this text as a description equivalent to the original image. Avoid assigning alternate text to transparent spacer images, or images whose purpose is solely decorative.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2