Hi S Sivasha,
I am assuming you are aware of how to create test data.
The next steps it to associate the testdate to manual script
Once association is done, while editing a step description or expected result, you actually can insert a testdata column. To do that click on the position where you want to insert testdata column in the text.
Then from the toolbar click icon for datapool column, it will display all available column for the test data, choose one of the column and it will be inserted into script.

Besides testdata, you would also like to explore execution variables in v301
These variables can be defined at testcase, testsuit and test script level with or without default value. You can have a step in manual script to set value of the variable. This is a good practice when you need to enter dynamic data at runtime like Order Number, and information to be shared between tests of a test suite execution, or between main script and child keyword scripts.

-|- Pramod K Chandoria