This type of text is called point type and is perfect for creating a headline on a poster or a line of text for a logo for instance. After you click, a small line of text should appear. In a blank area in the artboard on the right, simply click to add some text. To start with, select the Type tool in the Tools panel on the left. If you open this file, to make sure you can see all of the artwork in the document, choose View, Fit All in Window.
To follow along, you can open your own Illustrator document or this file from the practice files for this tutorial. To get started with type, you'll add a single line of text with the Type tool and apply a few basic formatting options to it.
Adobe Illustrator makes it easy to add text to your different projects and gives you some really powerful formatting options as well.