The aim of profiling is to (re)produce a defined shape, e.g. the exact concentricity or the grinding wheel profile. Both grit and bond are processed.
When sharpening, the bond of the grinding wheel shall be reset after the grain has become blunt (or after breaking out of entire abrasive grains or grain groups). Individual grains are broken and thus sharp cutting edges are produced. A grinding wheel is blunted if, for example, a better surface shall be achieved.