What is Alt Tag or Alt Text?

Alternative text gives alternative information for an image, photo or other visual element if a user for some reason cannot view it; either because of slow connection or if the site visitor uses screen reader technology.  A screen reader user will hear the alternative text.

Example: our logo alt text

An example is what a screen-reader user hears when navigating to our logo:

"DB-Fishbowl, just keep swimming..." "2 fishbowls with teng and clown fish jumping from one into the other, leaving the left one empty and right one full of fish".