Activity of the channel
The history of subscriber actions within sent messages is formed based on events in various communication channels. Selections based on this activity allow segmentation by engagement (e.g., by opens and clicks) and effective setup of retargeting mailings.
For most rules of segmentation by message activity history, the following types of selection operators are available:
- Exists/Does not exist — selection based on the presence of at least one action of the selected type for subscribers.
- Not once — selection based on the absence of at least one action of the selected type. Depending on the operator, you can additionally specify the mailing, Message, time period, or number of days from the current date.
- At least [n] times — selection based on the presence of the specified number of events for subscribers. Depending on the operator, you can additionally specify the mailing, Message, time period, or number of days from the current date.
Common Events for All Channels
For most communication channels, similar event types are available. Below are common event groups with indications of the channels where they apply.
Message Sending
The event is registered when a message is formed and redirected to the sending module (mail server, SMS gateway, push or messenger platform).
- Available in: Email, SMS, Push, Telegram Bot, Telegram Group, WhatsApp, Viber, VK Notify.

Message Delivery
The event is registered when the platform receives confirmation of message acceptance for delivery from the provider, gateway, or carrier.
- Available in: Email, SMS, Push, Telegram Bot, Telegram Group, WhatsApp, Viber, VK Notify.
Allows determining which subscribers' messages were not delivered due to temporary channel unavailability.

Message Opening / Reading
The event is registered when a user opens a message.
- Opened: Email, SMS, Push.
- Read: Email, WhatsApp, Viber, VK Notify.
For Email, opening is tracked using a pixel in the email body.
Allows obtaining the exact number of unique opens and calculating the Open Rate (OR) for a specific recipient group.

Clicks in Messages
Various events related to clicks on links within messages.
- Any click in message: Email, SMS, Push, VK Notify. Selects recipients who clicked on any link in the message.
- Click on link in message: Email, SMS, Push, Viber, WhatsApp, Telegram Bot, VK Notify. Allows specifying specific templates and links for selection of clicks.
- Click on unsubscribe link in message: Email, SMS, Push, VK Notify. Selects recipients who unsubscribed via a special unsubscribe link.
A click on an unsubscribe link has a separate event type and is not included in the selection by the rule "Click on link in [channel]".

Unique Clicks in Messengers (Telegram, WhatsApp, Viber, VK Notify)
For messengers, detailed click statistics are available:
- Click — each link click is recorded.
- Unique click — the event is registered if the recipient clicked on at least any link in the message (1 unique click per message).
- Unique click on link — unique click on a specific link (one event is recorded for each link, even with multiple clicks).
Non-delivery and Sending Errors
Events related to problems during sending or delivery.
- Non-delivery: Telegram Bot, Telegram Group, WhatsApp, Viber, VK Notify.
- Sending policy violation: Telegram Bot, Telegram Group, WhatsApp, VK Notify.
- Hard bounces (permanent delivery errors): Telegram Bot.
Subscription Management in the Channel
Events related to subscription and unsubscription from communication in a specific channel.
- Subscribed to channel: Telegram Bot, WhatsApp, Viber, VK Notify.
- Unsubscribed from channel: Telegram Bot, WhatsApp, Viber, VK Notify.
- Subscription confirmation: Telegram Bot, Email (Confirm link).
Channel-Specific Events
Email
- Email Read — the
{read}pixel triggers after 12 seconds of the email being open. - Click on Confirm link — subscription confirmation via Double opt-in.
- Subscription confirmation (Email) — subscription confirmation event.
Telegram Bot
- Telegram bot subscription confirmation — confirmation of subscription to the bot.
WhatsApp
- WhatsApp read — message read event.
Viber
- Viber read — message read event.
Checking an Event in a Message or Mailing
For precise checking of whether an event occurred in a specific mailing or message, use conditions with object specification:
- At least [n] times in messages / in mailings — the profile will be included in the segment if the action occurred in any of the selected templates or mailings.

- Not happened to a messages / mailings — the profile will be included in the segment if the action did not occur in each of the selected objects.

For reverse conditions, you can add a check for a preceding event (e.g., for a click — a check for delivery or opening).

Selecting Campaigns, Mailings, or Templates by Tags or Attributes
Selection of objects for checking is available not only individually but also by tags or by attributes.

* Meta, the organization that owns Instagram, Facebook, and WhatsApp, is recognized as extremist and banned in the Russian Federation.
* Viber™ is a trademark of Rakuten Group, Inc. Blocked in the Russian Federation.