This is the fifth layer of Agile Planning Onion. Every day the team is focused on completing the highest priority features in the form of working, tested software. As features are delivered within the iteration, they are reviewed and accepted, if appropriate, by the product owner. Each day a short, 15-minute standup meeting facilitates the communication of individual detailed status and any impediments or issues. Product is integrated and tested on a daily basis. Burndown charts are the key tool for the team to review progress on a daily basis. These charts help teams to take corrective actions quickly.
You can review the next planning layer by clicking on the following diagram. I recommend to watch this video to get a better understanding of linkage between all layers.