In general, just find the best move in the position. You don't really need to know what the plan was for either player, before the position arrived, just what is best currently.
That could be a number of things, such as the win of material or an unstoppable mating attack. It is also possible that you have to find the move or line that salvages or forces a draw.
I have just joined the community a few days ago. I am very interested in the daily puzzle but have serious trouble solving them. My question is how can you figure out what to do on the daily puzzle? There is no goal that I can find, just find the best moves, but aren't the best moves the one that fit in with your goal? I don't see how I can begin a game and find the 'best moves' unless I also find what the white and black players are trying to do. I have noticed that of the puzzles that I have seen all of the puzzles attack the king, but don't put him in checkmate? Thanks for reading and answering!