Beta testing is considered a low-cost tactic to test an app and collect user feedback. It involves identifying the target market, creating a landing page, defining goals and planning, choosing the right tools, making sure the app is stable, using guerrilla usability testing, beta testing with friends and family, reaching out to existing users, using online recruitment channels, attending offline events, offering incentives, onboard users, segmenting testers, engaging with testers, gathering feedback, analyzing qualitative and quantitative results, and holding a post-mortem analysis. To run an efficient beta test, it's recommended to start with a small number of testers and gradually increase the number as needed, aiming for at least double the initial number. A minimum of 4-6 weeks should be allocated for a beta test cycle, and the size of the team should be considered when planning the test to avoid stretching them too thin. After the end of the beta test, a post-mortem analysis should be held to evaluate its success and identify areas for improvement.