Definition & Meaning of "(as) slow as molasses"in English

What is the origin of the idiom "slow as molasses" and when to use it?

The idiom "slow as molasses" originates from the fact that molasses, a thick and viscous syrup obtained from the processing of sugarcane or sugar beets, has a very slow and deliberate flow. The comparison to molasses emphasizes something that moves at an extremely sluggish or slow pace. This expression is used to describe a situation, action, or person that moves at an exceptionally slow or glacial pace. It underscores a significant lack of speed or efficiency.