Agile

1)
Firstly, tester attend release planning and estimation, break down epic to story card. Then attend iteration (normally two weeks for one iteration) tick off, and working with BA to write Acceptance Criteria for each story card. Paring with developer when necessary to write automation test.
2)
when developer finish coding story card, he or she need to show tester what he has done which is call hand over.
3)
After that tester need to do exploratory testing against finished story card. If everything works fine, the final thing need to do for tester is show story to stake-hold (BA, business).
4)
By the end of each iteration, tester need to run regression testing as well.

Example:
-- story card --

As a Search Engineer,
I want to limit the number of results that are returned
So that too many results are not displayed that are not relevant to my search.