Reel weights

My whole life ive fished with open faced reels and only ever adjusted the small knob that adjusts how fast the spool will turn. I then use my thumb to help with casting from there. I have more sophisticated reels now but still adjust like before. I understand the weights are adjustable. I need insight on when and why to adjust these. I cast just fine now but im sure I can get more out of my reels.



Thanks.



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