What does the different grinding levels of coffee mean?

Depending on the method of preparation, coffee can be ground to different degrees of coarseness. Mainly, it can be said that the longer coffee grounds and water are in contact with each other, the coarser the grinding is used. From a finer grind, coffee aromas are released into the drink faster and stronger. Finer grinding on the other hand slows down the flow of water. The pot coffee and French press will have the coarsest grinds, the filter machine will have medium coarseness, and the nut pot and espresso machines will have the finest grinds.