What is considered "Positional Chess"?

Hello fellow chess players, I am asking especially those of you with plenty of experience (and anyone who knows something about the subject), what exactly is "positional chess"? I've heard the term thrown around a lot, often in relation to seemingly ordinary moves (for example, a rook taking an open file is called a "nice positional move"). Is there a specific definition for it? And when playing, should I actively look for these "positional" moves, or should I just rely on my intuition?

I haven’t read any books on the subject yet, and before diving deeper, I wanted to get a better understanding of what positional chess is all about. Tactics have brought me to where I am today, and I’m now focusing more on strategy. Strategy has served me well so far, especially in blitz, and I’m wondering if positional chess will have a similar impact on my play.

I think it's deeper than that. Tactical chess is setting up combinations that win material or deliver checkmate, for example. Positional chess is more subtle, such as taking control of specific squares, having a good pawn structure, or having more active pieces. So your example, with the rook taking the open file, is a developing move, which increases your control of the squares along the file. Positional advantages tend to make more tactics possible, e.g. your rook may now be threatening a back rank mate.

Positional chess is basically another word for strategy. If you are looking for books on it, 'Techniques of Positional Play: 45 Practical Methods to Gain the Upper Hand in Chess' is a good place to start.

Muito bom parabéns