Parameterization is being able to pass 
test data directly into feature files.
We just avoid hard coding test data into our step definitions
Data driven testing: running the same test against different data sets.
        Scenario: Login with correct credentials
         Given User is on the login page
         When User enters correct username "truckdriver412"
         And User enters correct password "UserUser123"
         Then User should see title is something

- Parameterization is being able to pass different test data from FEATURE FILES.
- We are able to not to "hard-code" some of the test data, 
 so that we can change it from our feature files.