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Most audiences get used more than once. Rather than rebuilding the same criteria inside every campaign, define the segment once on the Segments tab and select it from the Member Segment block whenever you need it.

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What you’ll build

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Save the segment

1

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Open the Segments tab

2

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Add a new segment

Select Add new Segment.
3

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Name it and set the conditions

Give it a name a colleague would recognise, then build the criteria. The condition builder is covered in Audiences & Data.
4

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Save

The segment now appears in the list on the Segments tab.

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Use it in a campaign

1

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Start a new campaign

Open the Campaigns tab and select Add new campaign.
2

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Add a Member Segment block to the canvas

See Block reference.
3

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Open the block

Double-click it.
4

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Select Use predefined segment

Find your segment in the picker and select it.
5

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Select Save segment

The block is now driven by the saved segment.
Migration note. Rewritten from Segmentation > User exercises > Create new segment and use it in the campaign. The original was phrased as a training exercise and linked into the separate CST User Manual wiki; those links now point at the pages that will hold the same content here.
Last modified on August 10, 2026