What is the function of column property in add data column activity

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What is the function of column property in add data column activity.
Can someone please help me on this.

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@vaibhav2.chavan:
Column - A DataColumn object that is to be appended to the column collection of the DataTable . If a variable is added to this property field, all of the properties under the Options category are ignored. This field supports only DataColumn objects.