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uniswap v3 comes with just-in-time (jit) liquidity, allowing LPs to provide concentrated liquidity within smaller price ranges, i.e., to specify a range of prices their liquidity is active for. this allows capital efficiency for correlated tokens.
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the liquidity range determines the share of fees. however, the tighter the tick range, the greater the risk of impermanence loss (the greater the likelihood that the price of the asset pair will move out of the tick range to volatility), which would generate no fees).
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a strategy is to scan the mempool for substantial pending trades, provide liquidity where a LP mints and burns a concentrated position immediately before and after a swap. no impermanent loss happens because everything happens within the same block.
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because provision has high costs, it's usually only used against very large swaps (i.e., it's a non-atomic strategy).