# Set Variable

The Set Variable action block allows us to assign a specific value to a variable within a conversation flow. As the name implies, it enables us to define or update a variable with a new value at any stage of the chat.

![](https://1047404187-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FeyvV4WfyYBGZdBoAuetg%2Fuploads%2F0qDKaAwyAKfO185AzGdy%2F0.png?alt=media)

#### **Why use the Set Variable block ?**

Variables are a powerful way to store information, share it across steps, and personalize conversations. The **Set Variable** block helps us:

* **Control flow logic** – Define flags or states (e.g., mark a user as a qualified lead).
* **Pass data to integrations** – Pre-assign values to be sent to a CRM, helpdesk, or other systems.
* **Simplify expressions** – Save a reusable value instead of repeating it in multiple places.
* **Personalize experiences** – Assign attributes like plan = Premium or status = Returning Visitor to customize responses.

#### **Where can the Set Variable block be used?**

The **Set Variable** block can be applied in multiple scenarios to make flows smarter and more dynamic, such as:

* **Lead qualification**\
  Example: If a user selects Company Size = 500+*,* set lead\_segment = Enterprise.\
  → Helps in filtering and routing leads later.
* **Conversation routing**\
  Example: Set support\_priority = High if a user reports an urgent issue.\
  → Use this variable for routing or assignment rules.
* **Default values**\
  Example: If no data is provided, set region = Unknown.\
  → Ensures downstream steps always have a fallback value.
* **Experimentation & tracking**\
  Example: For A/B testing, set test\_group = A or test\_group = B.\
  → Makes it easier to analyse flow performance.

#### **How to configure the Set Variable block**

1. **Drag and drop** the **Set Variable** action block into your conversation flow.
2. **Select or create a variable** that you want to assign a value to.
3. **Enter the value** the variable should store.
4. **Connect the block** to the next step in the flow so the conversation continues seamlessly.

{% hint style="info" %}
**Notes:** 

* You can use variables to map values to variables. 
* You can use arithmetic operators to define value as well.
  {% endhint %}