What is the purpose of the 'alt' attribute in an image tag?

The 'alt' attribute in an image tag serves the important function of providing alternative text that describes the content of the image. This text is especially crucial for users who rely on screen readers due to visual impairments, as it allows them to understand what the image conveys. Additionally, the 'alt' attribute also plays a role in situations where the image cannot be displayed, whether due to a broken link or slow internet connection, ensuring that the user still receives some context.

This practice aligns with web accessibility standards, ensuring that websites are usable for all individuals, regardless of their abilities. Properly utilizing the 'alt' attribute enhances user experience and is also a consideration for search engine optimization, as search engines can read this text to better understand the content of the page. Thus, the primary function of the 'alt' attribute is to ensure inclusivity and provide meaningful information about images presented on a webpage.