Writing test cases and executing it manually.
Finding defects in application\product.
Doing Functionality, Regression, Sanity, End to End and Integration testing.
I am strong in manual testing. I can find the defects for improve the quality in your application or product. For that I need a clear document about your requirement specifications in the form of Use case document/Wireframe/visual design.
I can raise the defects in the excel sheet and you need to fix it the defects and again send the list of defects, so that i can retest it in the application. I will do a regression testing if those defects impact the application.