In the SDLC (Software Development Life Cycle) we visit or client give us there requirment of the software. The team work on it, analysis, coding, design and testing. The software is fully tested with the help of automation tools sometimes it requires the mannual testing. Mannual testing is important part of the SDLC without testing the SDLC is not complete. It ensures the developer, the software have less bugs and it work appropriate at the client site