Game testing, a subset of game development, is a software testing process for quality control of video games. The primary function of game testing is the discovery and documentation of software defects (aka bugs). wikipedia.org

Beta Testing of a product is performed by real users of the software application in a real environmen and can be considered as a form of external User Acceptance Testing. wikipedia.org

Functional testing is a type of black box testing that bases its test cases on the specifications of the software component under test. Functions are tested by feeding them input and examining the output, and internal program structure is rarely considered (Not like in white-box wikipedia.org

Web testing is the name given to software testing that focuses on web applications. Complete testing of a web-based system before going live can help address issues before the system is revealed to the public. wikipedia.org

Mobile application testing is a process by which application software developed for hand held mobile devices is tested for its functionality, usability and consistency. wikipedia.org

Bugzilla is a Web-based general-purpose bugtracker and testing tool originally developed and used by the Mozilla project, and licensed under the Mozilla Public License. wikipedia.org

"GitLab is a web-based Git repository manager with wiki and issue tracking features. GitLab is similar to GitHub, but GitLab allows developers to store the code on their own servers rather than servers operated by GitHub." wikipedia.org

Software testing is an investigation conducted to provide stakeholders with information about the quality of the product or service under test. wikipedia.org

Documentation testing is part of non-functional testing of a product. It may be a type of black box testing that ensures that documentation about how to use the system matches with what the system does, providing proof that system changes and improvement have been documented. wikipedia.org

Manual testing is the process of manually testing software for defects. It requires a tester to play the role of an end user, and use most of all features of the application to ensure correct behavior. wikipedia.org

A test case in software engineering is a set of conditions or variables under which a tester will determine whether an application or software system is working correctly or not.

Quality Assurance (QA) is a way of preventing mistakes or defects in manufactured products and avoiding problems when delivering solutions or services to customers.