Bluffing is an important part of a winning poker strategy. But at the micros you have to do it at the right time and against the right opponent.
Here is an example of a well timed bluff against a nitty regular at the micros.
You definitely do not need to make bluffs like this to beat the lower stakes.
But hopefully this bluff shows you a higher level of thinking in poker that is necessary for success at higher limits.