Why do you need alt text on your images?

If you’ve built a website and started to learn about SEO, you are probably familiar with the term alt text. Put simply, alt text (also referred to as alternative text or alt tags) are used to describe the images on your web page.

ALT Text are used to describe about what the images are related to as Google does not read the image content.

  I agree with Mr Yosef answers, thanks for the invitation. 

Alt text are used to describe images to search engines what they are about and it will also helpful in SEO.

Because they complement images in content