What are the common signs of a clogged sewer pipe and how can it be effectively cleared?

Common signs of a clogged sewer pipe include slow draining sinks, gurgling noises from drains, foul odors, and water backing up in toilets or drains. To effectively clear a clogged sewer pipe, you can use a plumber's snake, a sewer auger, or hydro-jetting to break up and remove the blockage. It is recommended to seek professional help if the clog persists.