alt
Another helpful attribute is title. The title attribute provides the user with a pop up "tool tip" that provides additional information. You have seen how it was done in a previous movie that showing <abbr> tag. We added a title attribute within the <abbr> tag. When you hover over the word, a browser default pop up window show the content that is defined in the "title"> Sometimes, when you use background image, you cannot insert "alt" attribute, title is the next best thing to enhance usability.