How do I improve game knowledge

HoboBacon12 - Summoner Stats - League of Legends
HoboBacon12 / Silver 5 0LP / 106W 100L Win Ratio 51% / Xayah - 31W 16L Win Ratio 66%, Syndra - 20W 14L Win Ratio 59%, Ashe - 14W 19L Win Ratio 42%, Caitlyn - 14W 17L Win Ratio 45%, Twitch - 13W 7L Win Ratio 65%
So I've been playing the game for a little over a year now, and ended up silver in season 7. I am pretty okay with that rank, and I think it's what I deserved. I just want to know the best way to improve game knowledge. My mechanics, I think, are good enough for mid/high gold, but my game knowledge seems to be pretty crappy. I haven't been trying too much lately because it's preseason and I'm just trying things out, so my recent games aren't really much to look at, they're pretty garbage to be honest, but if you look at my ranked stats, my kd ratios are pretty good, and my cs is pretty decent (not saying it's amazing). I almost always win lane, unless I got an inting support or getting camped by jg in mid, but my win ratio is pretty bad in ranked, only 51%. Because I usually always win lane, I think it's my game knowledge holding me back from getting higher ranked. Anyone have good ways to improve it. I heard looking at my replays is a good idea, but I honestly don't really know what I should be looking for when I watch them. Thanks for any help that I get.
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