The taxes that were imposed by the Townshend Acts of 1767 were important because they helped to reignite anger in the colonies against England.
Just the year before, Parliament had repealed the Stamp Tax after heated protests from the colonies. In 1767, however, Charles Townshend decided to impose new taxes. These new taxes, which were import duties on things like glass, paper, and tea, made the colonists angry all over again. In response, the Sons of Liberty reorganized, new boycotts were called, and tax collectors were assaulted again (as they had been over the Stamp Tax).
By imposing these taxes, Townshend made the eventual revolution more likely besides making the colonists angry all over again.