This style makes cute and simple cartoon illustrations. How simple they are can vary a lot between the models, samplers, and prompt keywords. What they usually have in common are minimalistic compositions, cute characters, and soft colors.
There are two variations of this style. They're both simple, but one adds more details. Here's a comparison using the same prompt and seed:
I'd recommend using Euler a if you want a smoother look and one of the other samplers like DPM++ 2M if you want a more sketchy style with bolder outlines. Check out my example images for variations between similar prompts.
There are many words you can include in your prompt to guide the style. You could try switching out "cartoon" for these:
simple cartoon, doodle, whimsical doodle, sketch, detailed illustration, flat color vector, vector art, children's book illustration, drawing, drawing with ink outlines, on a white background (or color of your choice)