Why do some pathways to a church have a canopy over the gate what is it called?

Some pathways to a church have a canopy over the gate known as a "portico" or "narthex." This architectural feature serves both functional and symbolic purposes, offering shelter to worshippers as they enter and exit the building while also signifying a transition from the outside world to a sacred space. The portico can enhance the aesthetic appeal of the church and provide a welcoming atmosphere for the congregation.