# Customer Data

The Customer Data stores information about your Cutomers, as well as potential customers. This includes Personally Identifiable Information (PII) of the Customers.

### Customer Traits / Attributes

<table><thead><tr><th>Trait</th><th>Description</th><th width="139" data-type="checkbox">Mandatory</th><th>Example</th></tr></thead><tbody><tr><td>id</td><td>Unique identifier of a customer</td><td>true</td><td>ABC12345</td></tr><tr><td>customerSince</td><td>Registration date</td><td>true</td><td>2022-01-01</td></tr><tr><td>email</td><td>Email address</td><td>false</td><td>john.doe@company.com</td></tr><tr><td>firstName</td><td>First name</td><td>false</td><td>John</td></tr><tr><td>lastName</td><td>Last Name</td><td>false</td><td>Doe</td></tr><tr><td>street</td><td>Street name</td><td>false</td><td>Berliner Strasse</td></tr><tr><td>postcode</td><td>Postal Code</td><td>false</td><td>50676</td></tr><tr><td>city</td><td>City</td><td>false</td><td>Berlin</td></tr><tr><td>country</td><td>Country</td><td>false</td><td>DE</td></tr><tr><td>language</td><td>Language</td><td>false</td><td>DE</td></tr><tr><td>birthday</td><td>Date of birth</td><td>false</td><td>1999-12-06</td></tr><tr><td>gender</td><td>Gender</td><td>false</td><td>Male</td></tr><tr><td>phone</td><td>Phone number</td><td>false</td><td>0123 4567890</td></tr><tr><td>doi</td><td>Double opt-in indicator</td><td>false</td><td></td></tr><tr><td>subscriptionDate</td><td>Subscription date</td><td>false</td><td>2022-05-18</td></tr><tr><td>opt-out</td><td>Opt out indicator</td><td>false</td><td></td></tr><tr><td>lastNPSDate</td><td>Date of the latest NPS score</td><td>false</td><td>2022-05-18</td></tr><tr><td>lastNPSScore</td><td>Latest NPS score</td><td>false</td><td>8</td></tr></tbody></table>

### Example

You can upload User profiles using a JSON file. Please go to [Data Management ](https://documentation.crossengage.io/data-and-engagement-platform/data-management)to learn more.

```javascript
[
   {
       "id": "ABC12345",
       "customerSince": "2022-01-01",
       "birthday": "1981-01-31",
       "gender": "Female",
       "email": "abc@def.com",
       "country": "DE"
   },
   {
       "id": "DEF6789",
       "customerSince": "2019-07-08",
       "birthday": "1972-05-18",
       "gender": "Male",
       "email": "a12@xyz.de",
       "country": "DE"
   }
]

```