Caesar's generosity to the common people of Rome, the plebs, shows just why they loved him so much. According to Mark Antony, the late dictator has bequeathed in his will the princely sum of seventy-five drachmas to every Roman citizen. That this is a substantial sum of money can be seen by the reactions of the second and third plebeians:
Most noble Caesar! We'll revenge his death.
O royal Caesar! (III, ii, 235–236)
But in the words of a thousand infomercials, “But wait, there's more!” Not only has Caesar generously splashed the cash to the plebs who adored him, he's also left to the common people of Rome his walkways, private gardens, and newly-planted orchards. From now on, what was once private property will be public pleasures that the plebs and their descendants will enjoy forever.
This particular part of Caesar's will is important because it attempts to show his identification with the Roman people. In giving the plebs unfettered access to what were once his private walkways and gardens, he's consciously effacing the distinction between himself and the people upon which his power was largely based.
The plebeians always believed that Caesar, despite his aristocratic background, was really one of them. The particulars of his will merely confirm them in the truth of their convictions.