# Trigger

This tab opens automatically when you select a block type with a trigger function, such as **"Start"** and **"Trigger"** blocks.

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## Trigger

{% hint style="warning" %}
**It is recommended to always specify a precise trigger within blocks or build your logic by using the "Variable" field.**

Blocks with no trigger specified will trigger on any message from the user (client).

<img src="/files/dFrMtAwQZMl4qst7r1GN" alt="" data-size="original">
{% endhint %}

## Math type

In this field, the value of the variable is compared to the value being checked.

{% hint style="info" %}
The variable works together with the trigger. In other words, both the trigger and the variable must be met.
{% endhint %}

{% hint style="success" %}
You can study the topic of variable comparison in detail [in this article.](/chatbot/functions/variables.md)
{% endhint %}

## Advanced settings

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In the advanced settings, there are the following fields:

* Ignore triggers (Phrases to ignore)
* Priority
* Prevent repeated responses
* Callback-Only trigger

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### Ignore triggers

This field specifies words or phrases that the block will ignore, even if the Trigger matches.

### **Priority**

Priority of block activation (trigger checking). Each element in the builder has its own activation priority. By default, the highest priority is assigned to the Primary Trigger Check block.

### Prevent repeated responses

Enable the "Prevent repeated responses" toggle so that the block triggers for the client only one time.

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{% hint style="info" %}
To prevent repeated entry into a block with the "Prevent repeated responses" toggle enabled, pay attention to the connectors that may lead to this block.
{% endhint %}

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### Callback-Only trigger

&#x20;This toggle is available only in conditional blocks within the Advanced block settings.

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If the toggle is **ON**, the will trigger only upon receiving a callback in the chat with the client.\
If the toggle is **OFF**, blocks will trigger according to the settings in the Trigger field.


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