Granite is relatively low maintenance. It is not as low maintenance as quartz countertops, though. Granite is a porous stone, so it will absorb bacteria and liquids over time (which will discolor or stain the stone). The way you protect the stone is to have it sealed annually. This will prolong the life and look of the stone. Quartz on the other hand, is non-porous and needs no sealing.
Granite is also more susceptible to scratching than quartz as well, so you’ll want to be sure to use only microfiber cloths (or something equally non-abrasive).