# Using CSVs as Filter Criteria

Uploading lists of companies or people via CSV files to Primer is a straightforward process. Here’s a step-by-step guide to help you include these records in your ad audiences:

<figure><img src="/files/bRoFTZfG8ww0v0LfpBN1" alt="" width="375"><figcaption></figcaption></figure>

#### **Mapping Fields for People**

When uploading a list of people, map the following fields for optimal results:

* **First Name**
* **Last Name**
* **Company Name**
* **Domain**
* **LinkedIn Person Profile URL**
* **Email**

<figure><img src="/files/5qxCfYbvGAVTIrZ0BFzE" alt="" width="375"><figcaption></figcaption></figure>

{% hint style="info" %}
**Tip**: Mapping more fields improves the match rate of records to Primer’s database, enhancing their usability. The **LinkedIn Profile URL** **has the biggest impact.**
{% endhint %}

#### **Mapping Fields for Companies**

For a list of companies, the essential field to map is:

* **Company Domain**
* **LinkedIn Company Profile URL**

<figure><img src="/files/2CCiv3Zkp6PwGldAHi02" alt="" width="375"><figcaption></figcaption></figure>

#### **Review and Import**

* **Check Validity**: After mapping, you’ll see how many records are valid and will be imported. Records that cannot be imported will be flagged, including the row number for reference.
* **Reset Mappings**: If you make an error, you can reset the mappings and try again.
* **Import Records**: Click "Import" to finalize the process.

**Once your file is imported:**

* **Include or Exclude**: Choose whether to include all records from the file in your audience or exclude them.

<figure><img src="/files/im7Z6iwcz8WbXsbPdIOO" alt="" width="375"><figcaption></figcaption></figure>

* You are allowed **one CSV file per audience.**
* You can **reuse files in other audiences from the CSV Files tab.**

<figure><img src="/files/LBUtnGWwChwFlT5Z5HLt" alt="" width="375"><figcaption></figcaption></figure>

#### Common Questions

* **What is the maximum number of records I can import?**\
  There is no limit on the number of records you can import, the only restriction is a maximum file size of 25MB.
* **How can I improve the match rate of records in Primer’s database?**\
  To maximize match rates, ensure all required fields are mapped and include as much optional data as possible in your CSV.
* **How do I properly format CSV files for import?**

  Here are the formatting requirements for the CSV imports:

  * **People List**
    * First Name & Last Name: Use proper capitalization.
    * Domain: Enter the company's primary domain (e.g., [`sayprimer.com`](http://sayprimer.com/)).
    * LinkedIn Person Profile URL: Provide the full LinkedIn profile link.
    * Email: Must be a valid email address.
  * **Company List**
    * Company Domain: Enter the company's primary website domain (e.g., [`sayprimer.com`](http://sayprimer.com/)).
    * LinkedIn Company Profile URL: Provide the full LinkedIn company profile link.


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