By contrast, people often merely glance at graphics. Graphics might be nice to look at but the information value is often low. Granted there are exceptions, such as cutaway views of mechanical components or text rendered as a graphic on screen in order to preserve particular fonts, colours, sizes and other attributes. There is a very important additional reason why text needs serious attention. It has to do with search engines.
Search engines perform statistical calculations on any site offered for inclusion in the index.
The presence or absence of keywords, their placement, as well as the proximity of keywords to each other, are among the many factors that influence a search engine to rank one page higher than another even when the content of one page is similar to that of another. It boils down to text and the significance of a chosen keyword on a page. Experienced web designers write pages around target keywords. In our organization, we call this process 'tuning' a page for the desired keywords. Reading the excellent Search Engine Submission Tips at the Search Engine Watch site is one of the best ways a web page writer can create a page that will do well on the search engines.