Signal to noise ratio is when signal is what you want to hear while noise is stuff that’s not the signal. When it comes to telephony, signal is the voice while noise is electrical noise and turns to static. The further the signal will go, the worse the problems get. An example of this is a Political speech filled with noise or a mom giving a lecture. Signals, the the idealist terms, would be ideal noise that blocks your ability to see, hear or feel it.

For Claude Shannon, information was related to uncertainty. The more uncertainty, the more information created. In English, the “U” following the letter “O” has no uncertainty and thus contains no information; if there’s a “q”, there’s always a “u.” English is full of redundancy, the redundancy can be quantified and subject to rules or algorithmic processes.
The Information theory is very indifferent to meaning. To me, I completely agree that information has to be related to uncertainty or no new information can be created due to the curiosity needed.