That's really at the heart of next-generation, smart technology. There are different ways of storing, moving around, and showing information. Information can come in the form of pictures, writing, sounds like music or talking, or in a whole number of other ways. Some media use more than one form of information. For example, an encyclopedia uses pictures and writing.
Web pages use more than one form of information.
They usually have text, and sometimes have pictures. And often they'll have sounds, movies, animation, links, or algorithms, and in the future programmers will probably come up with all different kinds of other information to put on the Web. All that stuff is called content. The meaning of content is more than the sum of its parts. The way they are positioned, and their order, all make a difference in the meaning.