User satisfaction is a cornerstone indicator of any successful software project. Software projects are classified as successful only if the users are satisfied with the delivered software project result. Reducing the gap between users' expectations and the actual delivered software is one of the ultimate objectives of software project management. Therefore, it is essential to manage user expectations during the project, which is basically achieved by managing the user opinions related to the final performance of the software. However, this cannot be isolated from the adopted testing methodology, which is the way to guarantee the optimal user satisfaction. Furthermore, the stakeholder occupies a significant position in agile principles aligned with development teams. Flexibility to adapt stakeholders' late changes is also another gain in agility. Agility additionally focuses on the decentralized management approach to exploit any managing skills of the software project individuals. In this paper, we describe how these factors are relevant to the agile project management strategy. Our findings explain the hidden reasons behind the success of the agile strategy in software development projects.