A piece of metal that is fairly a thin and superficially bend in a piece of metal or wood that carries the rainwater or any weather related liquid off the roof represents a gutter.
All houses are equipped with gutters. The place you live in doesn’t matter, a gutter represents a standard piece into the stages of building a house.
When a gutter is bunged, you will have a problem in case you don’t detect this on time and that can make the rain water to leak improperly. This can be the start of a flood because of the water that remains on the roof. This flood can make small or big problems depending on the place where it can manifest. It can create problems into the roof shingles or into the drywall and top limit of the house. The severity of the damage depends on the time spent by the water being stagnant. The gutter must be checked for mold and yeast when this thing happens.