This scene potrays the very start of the story when it is revealed to flavius that people are not working and are instead waiting for caesar. This later shows why Brutus and Cassius are jealous of Caesar.
This scene is important as this is the defining moment in the story that makes Brutus seek power within Rome due to the influence of Cassius. He does this by questioning the Authority of Caesar and showing how weak he actually is.
This scene is important as it shows how Cassius and Casca have two different views on the ruling of Rome. Cassius pushes his ideas towards people in power in order to try and get rid of Caesar from power.