What if we want an advertisement, or other such content of the same size? We could use HTML to add it to a Page or Story. However, what if we want them to appear in many Stories without making a copy in each one, or if we want them to appear outside of the Story's margins, such as on the side of the web page? What if we want the advertisement or other content to be independent of the Page or the Story? The answer to these questions is: Blocks. Let's create a Block to advertise a CD. We already have an article about the CD, but this Block will be used where the article cannot.
Let's take a step-by-step approach to create a Block to advertise the CD.