# CSV

A list is a file containing identifiers for existing contacts that can be imported into your account and targeted immediately. **Each identifier must be associated with an existing contact in your Questera AI account.**

## Use Cases

There are a few ways to upload data into Questera AI via a .csv and it’s important to know the differences between them so you can quickly get what you need out of the platform.

**My CSV has a list of emails with other fields that I would like to use for segmentation and/or personalization.**

* The CSV can be uploaded as a [contact dataset](https://docs.simondata.com/reference/docs/contact-data-datasets) with the option to source the data from an upload instead of a database.
* The additional fields will need to be named and set for use as condition and/or content (segmentation and/or personalization).
* This option will require a full refresh before it becomes available for use.

**My CSV has a list of emails with no other fields and I would like to use it in segmentation alongside existing fields or segments (e.g. suppression).**

* When [creating a dataset](https://docs.simondata.com/reference/docs/create-a-dataset), choose **Contact Segment**.
* This will require a refresh to use.
* When in the [segment](https://docs.simondata.com/reference/build-a-segment) builder, search for *customer segment* and your new dataset will be in the drop down that appears.
* This is best used for suppression groups.

**My CSV has a list of emails with no other fields and I would like to use it in segmentation but do not need to mix it with other criteria.**

* The quickest way to target an audience from a CSV is the [list upload feature](https://docs.simondata.com/reference/contact-data-datasets). This allows you to upload a list of emails and make them available for segmentation in just a couple of minutes, instead of having to wait for a refresh. However, it cannot be mixed with any non list-upload segmentation criteria so you will only be able to use the CSV as your audience for taking actions.
  * Note: Emails must be present in **Questera AI** already.

**My CSV does not have a list of contact information.**

* A [lookup table](https://docs.simondata.com/reference/getting-started-with-lookup-tables) is likely the route we will go here. Contact your account manager for alternative workflows.