Definition: Alt text, or alternative text, is a brief description used in HTML code to describe the content and function of an image on a webpage. It appears in the alt attribute of an image tag and is essential for accessibility, helping visually impaired users understand the content through screen readers.
Benefits: Alt text improves web accessibility by providing text-based descriptions of images, making websites more inclusive. Additionally, it enhances search engine optimization (SEO) as search engines use alt text to index images, improving visibility and discoverability in search results.
Best Practices: Effective alt text should be concise, descriptive, and relevant to the image's context and purpose. It should accurately convey the image's content without being overly detailed, and avoid redundant phrases like "image of" or "picture of." Ensure each image on a webpage has unique and meaningful alt text to enhance both accessibility and SEO.
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