What is the Sprint Planning Meeting ? Some details

In the previous post, I had mentioned the 3 different types of meetings that we have in the Sprint process; this post will detail the Sprint Planning meeting in more detail. The Sprint Planning meeting happens at the start of the Sprint, and it is the meeting that decides the features that will be done in the Sprint cycle that is just getting started.
What is a Sprint ? A Sprint is a time period that defines one iteration, typically between 3-4 weeks. In this iteration, the team decides the features to be implemented, designs, implements and tests these features, and demos the features to stakeholders at the end of this cycle. All these activities start with the Sprint Planning meeting.
The team takes up the Product Backlog, which is essentially a prioritized list of features, and uses the Sprint Planning meeting to get more details of the requirements planned for the Sprint cycle, and then works out the list of features that these requirements (user stories) need to be broken down into. As an important first step, the needs to know an estimation of what is the amount of effort that is required for each requirement, and based on the total effort available in the cycle, a calculation is done of the number of features that can be done in the Sprint cycle. When this is happening for the first couple of times, the estimation of the features that can be done in the cycle can be inaccurate, but gets more accurate as the team gets more experience. The team would need to ask all the required queries from the Product Owner to understand and estimate the requirement in detail.
Once the list of requirements is defined for the Sprint Cycle, the team moves onto the second part of the meeting where there is a need to break up the requirements into much smaller discrete tasks; and this needs to be done for each requirement, with the estimation for each of these tasks also needing to be done.