3 tab vs.Architectural Roofing

Topic: 
Roofs
Question: 

What is the difference between architectural and 3 tab shingles? And what would be the benefits or downfalls of each?

Answer: 

"3 tab" shingles are the most common flat composition roofing shingles. Architectural grade roofing may also have 3 tabs but the material is embossed and/or consists of several layers of material. The "architectural" products also tend to be the higher end products with a longer warrantee. George