User Acceptance Testing (UAT) is the final stage of any software development life cycle, where actual users test the software to see if it is able to carry out the required tasks it was designed to address in real-world situations according to the client’s or customers’ specifications. UAT is often the last phase of the software testing process and is performed before the tested software is released to its intended market. The main goal of UAT testers is to validate the changes that were requested against the original requirement. UAT is effective for ensuring quality in terms of time and software cost, while also increasing transparency with users. UAT can be done in-house with volunteers, by paid test subjects using the software, or by making the test version available for download as a free trial. The UAT process involves identifying and involving key stakeholders, such as end-users and business representatives, and testing the software to validate whether it meets their requirements and expectations. UAT should be thorough and reflect user requirements, while also identifying potential problems not yet detected in previous tests. The main purpose of UAT is to validate end-to-end business flow, and it does not focus on cosmetic errors, spelling mistakes, or system testing. UAT is performed by end-users or designated stakeholders to ensure that the software is ready for deployment and will deliver a positive user experience, ultimately contributing to the success of the project.