Vector graphics
Vector graphics are not affected detrimentally by scaling (enlarging or reducing their size). Because vector elements are mathematically-defined, scaling simply requires modification of their mathematical locations.
This makes vector graphics ideal for logo design. The vector logo can be scaled up or down with out losing quality and would enable smooth transition between various media
Raster graphics
Raster graphics are resolution dependent & cannot scale up to an arbitrary resolution without loss of quality. Raster graphics deal more practically than vector graphics with photographs and photo-realistic images, while vector graphics often serve better for typesetting or for graphic design. Typically, a resolution of 150 to 300 pixel per inch works well for digital printing.