Charts give you your project manager, scrum master an understanding. 
how the project is going. 

There are numerous charts. Project manager uses to track and communicate the progress of the project.

• burndown chart 
  • Shows how much work is remaining to be done in the project.
  • how much backlog is remaining.
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• burn up charts
  • shows how much work has been completed in the total amount of work.
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• Cumulative Flow Diagram (CFD):
  • Kelps you to monitor the flow of work okay. 
  • and identifying bottlenecks in the software development process.
  • it presents the distribution along different stages. Each stage is represented by a color. So that each band shows how many tasks set at what process state at a given time. 
  • A completed state over here which is denoted in green color. Similarly we got in review in progress commitment research.
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• Velocity Chart
  • Velocity charts show completed work for each sprint. There are numerous sprints here. We committed to completing four user story backlogs in sprint one.
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• Gives an idea how much backlogs we can complete in a current sprint.