Sprint is a container that contains all other events (Sprint Planning, Daily Scrum, Sprint Review, Sprint Retrospective).
It’s the core Scrum event during which all the work is done.
Time-box for the sprint is 1 month. The length of the sprint can change however, it is not recommended to change it often.
The sprint should be long enough to meet the sprint goal, but short enough for the sprint goal to remain up to date, with respect to changing environment.
Shorter sprints provide a higher frequency of improvements and learning, reducing the risk and the cost.
The main benefit of the sprint is a reduction of risk and the distribution of costs.
The sprint can be canceled if the goal of the sprint becomes obsolete.
Visual tools such as Burndown charts are used to monitor the progress of work in the sprint.
Burndown is a chart showing the initial scope of the sprint and the remaining work as the sprint progresses.