Explain the text within these chapters that is in italics. What are they, and what is your impression, thus far, of a feed?

The paragraphs in italic represent advertising blurbs sent to Titus on his feed. The feed is a computer in your head that is constantly running, advising you on what to do, where to go, and even on vocabulary. Users are able to watch television, chat with one another, and look at ads, all without leaving their own brain.