# Purchase Frequency criterion
The Purchase Frequency criterion is a segmentation criterion that enables defining a [segment](/assets-library/creating-and-managing-segments.md).
To learn how to create a segment, please refer to this [article](/web-experimentation-and-personalization/targeting-step/how-to-create-a-segment-who-section.md).
## đź“– Definition
The Purchase frequency targeting criterion enables you to create a segment of visitors based on the frequency of the purchases they made within a defined period of time.\
The Purchase frequency criterion is based on the transaction tag, which enables you to collect specific information on the buying patterns of users.
## ⚙️ Configuration
To configure the Purchase frequency criterion, apply the following steps:
1. Select the type of interval from the first drop-down list: `more than` (strictly higher) or `less than` (strictly lower).
2. In the *Time(s)* field, manually enter the number of desired purchases.
3. Select the type of interval from the first drop-down list: `within`, `beyond` or `between`.
4. In the *Day(s)* field, manually enter the value(s) depending on the chosen interval.
{% hint style="warning" %}
For data confidentiality reasons, you cannot target visitors who made their last purchase over a year (365 days) ago.\
Keep in mind that this duration is depending on your browser settings and policy.
{% endhint %}
You can also refine targeting by adding advanced conditions, thus defining the last purchase based on:
* payment method;
* delivery method;
* SKU code of the product;
* product category;
* transaction amount;
* coupon used.
## đź’ˇ Use case
Example: a segment with people that have made more than 5 purchases within the last 30 days using an American Express card.\
All the values that need to be filled in are your websites’ variables. **You have to enter the exact string (without quotes)**: `Paypal`, `clickandcollect` etc. and match the spaces and special characters.\
However, you don’t need to match lowercase and uppercase letters. For example, `Paypal` and `paypal` will both work. You don’t need to specify the currency, just enter the amount in your website’s currency.
## 🔎 How Does It Work?
Within the tag, we created an object called **`ABTastyData`** that contains information about your visitors’ journey. Inside this object, we store transactional data in locations called **transaction** and **items**.
This is performed when you integrate the transaction tag on your website. With that integration, the generic tag receives [***hits***](https://developers.abtasty.com/docs/data/universal-collect/uc-hits#transaction) from the transactional tag when your visitor validates a transaction.
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