What it means in plain language
A raster graphic is an image made of pixels, the quality of which depends on the resolution and which may lose sharpness when magnified.
Where it genuinely helps
Raster graphics use pixels and suit photography and texture, but enlargement beyond source resolution exposes softness.
What to decide before acting
Match dimensions to use, preserve the source and export variants for screen, format and purpose.
How to tell whether it works
Review detail, colour profile, file weight, compression, retina scaling and alternative text where published.
