Images are saved at a certain resolution which is measured by the amount of pixels per inch (ppi).

Almost all web images are raster images, and therefore anything you pull from the web, as well as all photographs, are raster images. Pixels are tiny squares of color that when combined, complete an entire image. Raster images are graphics that are made up of pixels.

In order to understand this, however, first let’s talk about how images are created. For many of you, the graphics you produce are a reflection of your brand, so it’s time to sort out this issue once and for all! I know you want your business to be taken seriously and you want your graphics to make you look like the rockstar you really are, so today I’m giving you a few tips on how to avoid this problem. I personally dislike the results but you might find them acceptable.Not only do pixelated images look like crap, they’re hard to read and they show a huge lack of professionalism. There is also the pixel art tracing algorithm included in recent versions of Inkscape. Other algorithms are hq2/3/4x, advmame, 2xsai, etc. , showing the results of upscaling a pixeled sprite incrementally, with smoothness=2 anisotropy=1 sharpness=50. way less blurry than just hitting 'scale image' in your favorite image editor, but still blurry nonetheless.) scaling up 400% once, it's still got problems (eg. Though scaling up 200% more than once produces a better result than eg. Scaling up more than 200% is not recommended, IME. The Anisotropy option specifies how much the result is based on this vector information, and how much is based on raster. The technical details are a little involved but it basically attempts to vectorize things and then scale them in accordance with this information. GMIC's 'Repair -> Upscale (diffusion)' is the closest I've seen to this.

Inkscape trace bitmap blurry