What is the advantage of using the 'alt attribute' in image tags?

Using the 'alt attribute' in image tags significantly enhances both SEO (Search Engine Optimization) and accessibility. The primary purpose of the alt attribute is to provide alternative text for an image, which serves a dual function.

For search engines, the alt text helps to describe the content of the image, allowing search engines to better understand the context of the web page. This, in turn, can improve rankings on search engine results pages as images become indexed in relation to their descriptions.

On the accessibility front, the alt attribute is crucial for users who rely on screen readers due to visual impairments. When a screen reader encounters an image, it reads the alt text aloud, enabling users to comprehend what the image conveys. This ensures that all users, regardless of their visual abilities, can access the same information, fostering an inclusive web environment.

The other options do not align with the primary function of the alt attribute. For instance, it does not affect image loading speed, has no direct capability to enlarge images or enable interactivity by making them clickable. Instead, its main advantages focus on improving website usability and searchability.