What is the meaning of alt that is after the image location?

Answer 1

The required alt attribute specifies an alternate text for an image, if the image cannot be displayed.

The alt attribute provides alternative information for an image if a user for some reason cannot view it (because of slow connection, an error in the src attribute, or if the user uses a screen reader).

Thanks to that Google also can shows the right images (keywords from alt).

Answer 2

Thanks bro