Oversimplifying for sure but if you're loose and aggressive against a tight aggressive player, you're going to make them fold most of the time and win a small amount by applying pressure on bluffs but every once in a while if you get too aggressive and they call you because they have a monster hand then you get wrecked

In poker, like in trading, the key is knowing when you have an edge and being aggressive but also knowing when you have a losing have and cut your losses. It's the balance that makes a good player/trader.

Aggression generally wins the day but pay attention to the size of the bets and their position. Generally, you want to make a lot of small bets to show action (they can fold for a minimal investment) and leverage table position to make other players make hard decisions.