An alt tag is some HTML code that allows us to give images a text description.
Alt tags are HTML tags that are used to define images for search engine rankings.
ALT tags are used to describe the image or what the image is representing.
Alt tags are important in SEO and it will help in describing image.
Giving names for the images is called alt-tag it is more useful for SEO ranking
So many answers are posted for the same. So OP are you clear now?
It is for post count only
It provides alternative information for an image if a user for some reason cannot view it
I think now this thread should be closed because so many answers are posted on ALT tags.