Part of it depends on your opponent. The better they play, the more difficult it will be to get a high accuracy percent.
Part of it depends on the opening. Some openings lead to stale and straight forward positions while other openings lead to such crazy positions that it will cause even very good players to make a lot of mistakes.
Part of it depends on if the positions lend themselves to super quick analysis (which is what chess.com is doing). For example if you play a move that is mate in 6 but the engine sees a way for you to play a mate in 5, then it can say you were inaccurate even though this sort of inaccuracy doesn't matter. Also in some endgames and some attacks the correct moves involve very long term thinking, so the quick analysis can mark your good moves as inaccurate or your inaccurate moves as good.
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So the number is not really that important, but it is a fun feature, and getting a high percentage is always nice even if it doesn't actually mean you played like a GM most of the time
Mostly I take it as meaning I played a lot of reasonable moves without many (or any) big blunders. Were they the best moves? Almost certainly not, but consistently playing very reasonable moves will put a lot of pressure on human opponents, so it's nice.
This might initially sounds like a stupid question and maybe it is
But how important is accuracy and what is a good number? I get lots of games in 90+%, is that good. In most aspects of life 90% is good, but in chess that could be garbage? I'm a new player, hoping to improve. I do analyze most of my games and I was wondering about that accuracy number.
Thanks, and if this was a dumb question, I apologize