Alt tags, or alternative text, might seem like a small detail when it comes to website optimization, but they play a crucial role in enhancing your website's visibility on multiple sites and accessibility. At its core, an alt tag provides a textual description of an image, enabling search engines to comprehend the content and context of the image. This description not only helps visually impaired users understand the image but also assists search engines in understanding and indexing the content to improve its visibility in search results.