Manual Testing (Pros and Cons)

Pros of Manual

1. If the test case only runs twice a coding milestone, it most likely should be a manual test. Less cost than automating it.
2. It allows the tester to perform more ad-hoc (random testing). Since, more bugs are found via ad-hoc than via automation. And, the more time a tester spends playing with the feature, the greater the odds of finding real user bugs.

Cons of Manual

1. Running tests manually can be very time consuming.
2. Each time there is a new build, the tester must rerun all required tests - which after a while would become very mundane and tiresome.