Students are like the audience for a lesson given. They follow the course of teaching and they learn things in the process.
For teachers, please refrain from unnecessarily drag the process of knowledge delivery in the class. If you have solid materials and plan then it's alright to extend the lesson with relevant enrichment. But never waste time asking questions about things you clearly haven't taught them yet. Or repeating the same thing over and over again albeit the noticable dull from your the students. Ffs don't drag.
Just like how you get annoyed with the extremely slow and redundancy in plot of the Indonesian sinetron (or in Dragon Ball Z anime) that seems to drag the whole course of all events, that is how students feel when a teacher wanders around aimlessly rather than just going straight to the point.
Time wasting might benefit a party, like in the case when the leading team wastes time by faking fouls or stalling the game during the final minutes of a soccer match. But for the other parties (the opponent and the fans) it was irritating. A downright turn off.