what is a roofing square 20

https://myroofpitchcalculatorpath.readspirex.com/posts/how-a-roof-pitch-calculator-simplifies-roofing-measurements

A roofing square is simply a unit of measurement used in the roofing trade to simplify material estimates. One square equals 100 square feet of roof surface, so when a roofer says a job is 30 squares, they mean 3,000 square feet. It makes pricing and ordering shingles or underlayment much easier.