Whats the diference between a serrated blade and a straight edge blade?

Question

and the main benefit of a serrated blade over a straight edge blade?

Answer 1

serrated has teeth

Answer 2

A serrated edge is like a tiny saw.  It will tear through the materal and leave a jagged edge.  A straight edge is like a razor and will leave a clean edge.

Answer 3

serrated blade are jagged having saw like sharpened teeth which cuts through more dense materials like bread knife. whereas the straight edge blade is like the daily core utility knife and are best for cutting foods that can be either soft or firm such as fruits, vegetables and meats.