positioning things must know for beginner?

beginner player here . What a must know positioning things in chess ? For example , I watch lot chess network videos ,and found things like 'chess holes' 'good and bad bishops' 'targeting pieces' things that help me not only hope that my opponent drop a piece but be awere of my positioning play . What more positioning things I should study to improve?

https://www.chess.com/article/view/how-to-play-positional-chess

https://www.chess.com/article/view/test-your-positional-chess

https://www.chess.com/article/view/do-you-really-understand-positional-chess

https://www.chess.com/article/view/get-ready-to-test-your-positional-chess-again

https://www.chess.com/article/view/can-you-pass-this-positional-chess-test

https://www.chess.com/article/view/how-to-calculate-long-term-advantages-in-chess

https://www.chess.com/article/view/learning-basic-pawn-structures

https://www.chess.com/article/view/learning-pawn-structure-for-chess-players-under-2000

https://www.chess.com/article/view/your-pawn-structure-is-your-friend

https://www.chess.com/article/view/more-pawn-structures

Good Positional Chess, Planning & Strategy Books for Beginners and Beyond...

https://www.chess.com/blog/RussBell/introduction-to-positional-chess-planning-strategy

https://www.chess.com/blog/RussBell

+1 I also recommend looking at endgames - regardless of your level though. A beginner may not be studying B+N+K vs K yet (rare endgame to see in practical play), but even just basic pawn endgames or checkmates with Q+K vs K or R+K vs K can go a long way. When I was first getting more serious into chess (rating circa 1000), it was a BIG confidence boost to know that I could win most King and pawn endgames if I was up even a single pawn! This simple endgame (which I studied a lot) has a lot of subtle variations to it; but the patterns and themes can quickly tell you if you are facing a win/draw/loss position - and at 1000-level play, your opponent win usually not play best which has many times let me convert a better result from a losing endgame. (Common example being something like my opponent having a pawn + King vs my lone King and they lose the opposition and I could hang onto a draw xD). This simple endgame knowledge will prove helpful many times over.

Maybe it's not strictly positional but undefended pieces and king safety is something that always is beneficial to look at. Looking at tactics problems and first of all look at king safety for both sides only after this look at undefended pieces for both sides. identify every single piece that is undefended.

While the links shown above should help, I would recommend getting a good beginners' book on chess. It will explain basic tactics and strategies, and most of the terms you mentioned. I would recommend the following by GM Yasser Seirawan. (I have added the level of player the book is intended for in brackets.)

Play Winning Chess (beginner to intermediate), Winning Chess Openings (Beginner), and Winning Chess Tactics (Beginner to Intermediate).

Good luck.