No offense but you really need to be sure you have asked the question in a way which English speakers will understand since that is the language in use on this forum.
Removal of ambiguity is one of the prime directives (or "most important things" for you non-Trekkies lol) in testing (IMHO). Your question is not only grammatically incorrect, but also neither gives clues as to what you are trying to achieve, nor indicates what steps you have taken to answer the question yourself.
To get a precise answer here, it would help to:
- specify what you are trying to do
- indicate what you have done to try to achieve this
- detail the problems which you've found
So, at the risk of being lambasted for spoon-feeding, a datapool is first and foremost an array of values which the script can read to e.g. determine actions to perform or, check expected results or, get values to insert in fields to check if the AUT responds in the expectd fashion (there are many uses for a datapool).
A Datapool has whatever columns were in the CSV file you imported to TestManager, or whatever columns you added yourself if you made the datapool in TestManager. A datapool is one CSV file stored in a sub-folder of the project in which it was created. See Help for more info...