AD with Four Principles: contrast, repetition, alignment, and proximity.

I think this ad uses all design principles, it is not one of my  favorite ads, but it is following technique.

Contrast: The bright red heading is a sharp contrast to the blue tones in the image and draws in your attention, letting you know the organizational structure of where the heading is.

Repetition: The red circle is repeated

Alignment: The text is aligned, the text in the top heading is aligned with the text in the footer. The page is created with unity, nothing seems out of place, its organized and professional looking.

Proximity:
The related text is placed together; the heading includes the title text and the footer text contains text with a call out to turn the page. The circles are also placed near each other.