The Select process
Use the Select process to define the criteria to build lists of contacts, such as customers, accounts, or households, from your marketing data.
Select is one of the most frequently used processes in Campaign. Most flowcharts begin with one or more Select processes. The Select process outputs a cell that contains a list of IDs, such as customer IDs, which can be modified and refined by other processes.
Selecting a list of contacts
Targeting Digital Analytics segments in campaigns