Tech people are not the people with 'real jobs' while everyone else 'bullshits'.
Terms are above your head because they generally relate to operations outside the scope of your knowledge.
(Edit: 'omnichannel' could mean a lot of things, it's definitely a bit 'buzzwordy' but it almost assuredly refers to some cross functional project of some kind that the OP is not aware of. This immediate implication of 'things I don't understand are bullshit' is antisocial and a bit glib - maybe understandable for some young people (?) but still, it's a problem to default to this posture.)
The biggest 'bullshiters' tend to be on the tech side, who go on and on about technology that is not needed, this is because they can very easily talk past others on domain knowledge.
I sit on both sides of the fence, and as soon as I get on the business side, I immediately see it - tech people 'controlling' the schedule and much of everything else because of their domain knowledge, often without the self awareness to recognize what's going on, operating with the implicit assumption that their need to push back 2 months for some refactor is inherently more important that other needs.
And yes - a lot of effort is filler and inefficient - that is probably the real culprit here.
Do not heed any of this ridiculous Machiavellian advice (aka 'keeping notes on people'? WTF?). Assume the best, do your jobs, obviously some people will BS, oh well, move on.