According to wikipedia, it means that he believed that citizens should have more input into the way party’s presidential and vice presidential candidates are selected, and that citizens should have a larger influence onto the government, one of which ways is to have elected judges (as opposed to appointed judges) and another way is to expand the definition of a voter to include all white male adults, not just property owners.
But Jackson was also criticized for political patronage, although he was credited with being the enemies of the banks and he also implemented the theory of switching office holders on a regular basis as a method to prevent corruption if the civil services.
From what I’ve read, Jackson considered himself as a refomer amongs Democrats, he represented the political reform wing of the Democratic party. He represented an era where the two party system in the U.S is expanded in the South, which was formerly dominated by one party.
http://en.wikipedia.org/wiki/Second_Party_System#Jackson:_Bank_War_and_Spoils_System
http://en.wikipedia.org/wiki/Jacksonian_democracy