Text can be both informative and provide visual appeal to your website
Click on the "+" in the middle of the Page where you want the text to appear. Type in the Text.
Important Point
In the image above, note that the Text is located within a "block". That holds for other page elements, e.g., Images, Photo Grid, Video, etc.
It is advisable to add each of your page elements in their own "block". Doing so will allow you to easily Reorder Page Content these elements if the need arises.
Note
The app includes a very good spell/grammar checker