I don’t understand the puzzles...

That's part of the challenge of a puzzle - not knowing what the end goal is but figuring out the best course of action yourself. It could be checkmate, winning the opponent's queen, going up in an exchange, etc.

Hi there. There is normally a hint option to see the next move and after the puzzle there is an analysis option too see the computers line. The solution to puzzles is normally mate or material advantage (normally a large advantage like going up a whole piece). Puzzles rely on forced moves and tactics so you should first do the lessons on common tactical patterns (skewers, pins, etc.), forced moves and powerful moves. Then start with a low rated puzzle, you will struggle if it is too hard for your ability, and look at all the checks, captures and threats (forcing moves). Then it's a case of finding the solution. To improve, ignore the clock and aim to get them right first time.
But... but there is an analysis option after (the icon looks like a magnifying glass looking at a chessboard). Right next to the green "next problem" button.

I don’t get it.
Take it from another beginer:
What helped me the most was the puzzle in survival mode (I'm using the portuguese version of the app, so I don't know if it's the right name. I mean the one with no time limit). Take your time and study the ones you got wrong. Remember you are doing it to learn, not to win.
About the make fun part: This is not facebook. Whoever answers a beginer's question with sarcasm is just hidding his own problems. Don't be afraid to report if it happens.
I don’t get it.
Sometimes I ‘win’ and it’s checkmate and other times, I ‘win’ and I have nothing left on the board. I have no idea what my objective is in puzzles. It would help if I did.
Mind showing some examples of the puzzles you do not follow? Copy the FEN into a chess.com diagram and put up the moves.
I think this is a good introduction to how to solve problems. She is going a bit too fast for pure beginners, but you can always slow it down, or watch it twice!
https://www.youtube.com/watch?v=-hHtuJTHwRM
This also looks useful
https://www.youtube.com/watch?v=T3lvEYVxcxc

I've been on this site for less than a month. I also was puzzled about puzzles and lernt from others that the goal is to find the best move for the given situation. And there is usually some dynamite move -- a mate -- winning a piece (or pieces) -- or just getting out of a jam.
Imagine a real life in person game. One player walks away and says, "Please take over for me."
You look at the board without fore knowledge of what has gone before. No preconceived notions about strategy.
Your task is to evaluate the situation, what are the potential lines of attack -- both yours and the opponents. And to find that killer move, or at least the best one.
The difference between the puzzles and real games is that in puzzles, you are assured that there IS a killer move.
Some puzzles are to win material, others are to achieve a checkmate.
Look for a checkmate, then look for a target. Usually you are looking to win a piece or win a rook for a bishop or knight. This is called winning the exchange.
It's taking me a while to get past the fact that knowing a solution must exist takes away from how realistic puzzles are. In a real game, there are many positions that aren't "puzzle-worthy," in that they don't have a clear solution that leads to a mate or winning material or an objectively better position. I can't analyze every position in a game the way I analyze a puzzle because I have no idea of there's a solution or not. I supposed the idea is to develop pattern recognition. After solving enough puzzles, you start to notice those positions in-game... but that would require solving thousands and thousands of puzzles. I guess that's why I'm just an amateur.
I don’t get it.
Sometimes I ‘win’ and it’s checkmate and other times, I ‘win’ and I have nothing left on the board. I have no idea what my objective is in puzzles. It would help if I did.