Against players who play too many hands, profit by playing tight, avoiding bluffs, and just playing better starting cards. With players who play too tight, steal blinds, value bet strong hands, and bluff more since they'll fold too readily.
In poker, exploit opponents' tendencies by adjusting strategies - induce bluffs from non-bluffers, bet their checked weakness, and call missed bluffs - but beware risks from frequent bluffers with a limited bankroll.