The first good design example is provided by Heinz. They use short and clear sentence to communicate with audience, and the picture shows how fresh and tasty of their tomato ketchup. The second good design has a carrot and chopping board on it, but both of them were chop in many piece. Audience might not be able to understand the massage at very first time they saw it. However, once they notice a little knife locate on right bottom side, then people will realize this is an advertisement for knife.
The first bad design has a giant green face which will scare people and have negative feedback. The words overwritten on each other at top make audience difficult to read. Therefore, choose of font and structure turn this to a bad design. The second bad design is a logo, which the fonts are too fancy and difficult to see.