Planning poker is a popular technique in Agile that helps developers accurately estimate the amount of work. The use of planning poker in Vietnam is gaining popularity and many teams apply it to improve work efficiency. At the beginning of the planning work, each member possesses a set of planning poker cards, which have value as the number. When members hear this task, they secretly choose a card that correlates with the workload. Then, all cards are revealed at the same time, and if there are any significant differences, a team discusses them. Thus, this is how to use planning poker to ensure transparency and consensus within a project. Specific steps while conducting the project at vn are: introducing the work, choosing a card, determining the comments and agreeing the final estimation. It is not only a simple way to use the planning poker but also a kind of incentive for members to express their views. Understanding how planning poker works will help vn Agile teams optimize software development.