Hi Atul Keshav,
If you go to Business Role ( MarketingPro) under this business role , under Campaign you can find the Campaign Id, once you click on the Campaign under the MarketingPro business role, keep the cursor on Campaign ID and press F2, you'll get all details of the component and the related technical details ( campaign ID will be stored in the form of External ID(STRUCT.EXTERNAL_ID)).
go to TCode --> bsp_wd_cmpwb . open this component and open the Corresponding View and context node check out the Base Entity, once you get the base entity , check that in the BOL model browser tab and check out the structure and find the table by using the " Where Used List".
Reply if you have any doubt.
Regards