What are the differences in image quality and depth of field between lenses with apertures of f/1.8 and f/2.8?

Lenses with apertures of f/1.8 generally produce better image quality and shallower depth of field compared to lenses with apertures of f/2.8. This means that f/1.8 lenses can capture more light, resulting in sharper images with a more pronounced background blur.