Manual testing and automation for the "Stuffer" project involves verifying purchasing, production, and sales processes, alongside salary, accounting, and employee management functionalities. For "Groupz," it focuses on group creation, communication tools, file sharing, and event planning features. "Ayyanar Petrolbunk" requires testing of offers, accounting, stock management, and sales recording. In the "Office" project, manual testing spans website functionality and online interview for openings. Each project demands thorough manual testing to guarantee smooth operations and meet user expectations across various functionalities.