What happens when installed ceramic tile is not level?

you can hide some leveling issues with the grout, but if it's really noticeable then the surface wasn't leveled out first (self-leveling concrete) or the person laying the tile didn't know what he was doing. the good thing about tile is that you can chip out the bad area, reset new tile and re-grout to fix it. you don't have to tear out the whole room or counter