---
title: How do I update a custom segment?
description: Custom segments on the Apifon platform are dynamic. When subscriber data changes, you can refresh a segment to view updated results that meet its conditions. If you want to create or update a segment
---

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# How do I update a custom segment?

Custom segments on the Apifon platform are dynamic. When subscriber data changes, you can refresh a segment to view updated results that meet its conditions.

**Steps**

If you want to create or update a segment that includes **specific subscribers who do not share the same field values** in your list, follow these steps:

1. Create a new[**custom subscriber field**](https://kb.apifon.com/fields-and-groups?hsLang=en#custom-field) with type Text (e.g., *Today's Segment*).
2. **Prepare an Excel file** on your computer that contains **only the subscribers** you want to include in the segment.
3. **Add a new column** in the file with the same value for all rows (e.g., YES). This value will be used to identify these subscribers.
   
   ![](https://kb.apifon.com/hubfs/image-png-Mar-27-2023-11-35-31-2404-AM.png)
4. [**Import**](https://kb.apifon.com/import-subscribers?hsLang=en) **the file** into your list. Make sure the **Update my existing list** checkbox is selected to update existing subscriber records.
5. **Create a new segment** to include all the subscribers in the new file, using the following condition:  
   **\[Your custom field\] → is → \[The value you set\]**  
   (e.g., *Today's Segment → is → YES*)
   
   ![](https://kb.apifon.com/hs-fs/hubfs/image-png-Mar-27-2023-11-29-10-4752-AM.png?width=638&height=219&name=image-png-Mar-27-2023-11-29-10-4752-AM.png)

 

This way, your segment will include **only the specific subscribers** you marked in your file.

Now you know how to update a custom segment on the Apifon platform! 🚀

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