An image alt tag, also called an "alt attribute" or "alt text," is an HTML attribute added to image tags to give search engines and people who can't see images a text alternative.

‍

It's crucial to use alt tags to make websites more accessible because screen-reading tools use them to describe images to people who can't see them. They are also shown when an image file can't be loaded.

‍

Regarding search engine optimization (SEO), alt tags tell search engines more about your images, which can help them appear in image search results. Using relevant keywords in your alt text is a good idea. Still, your main goal should be to describe the image accurately and briefly.