# How can we help?

## Overview

This article provides an overview of experiments in batch messages, automated messages, and Podium orchestrations, highlighting some key differences.

## Batch message experiments

In batch messages, you can create subject line and message body experiments to optimize engagement.

- [Learn about subject line experiments in batch messages here](https://support.cordial.com/hc/en-us/articles/115005532988).
- [Learn about message body experiments in batch messages here](https://support.cordial.com/hc/en-us/articles/115005533008).

You can [view the performance of these experiments](https://support.cordial.com/hc/en-us/articles/115003902411-Batch-experiment-performance) in the left sidebar of the message creation page, under **Message Performance**.

The ability to add a control variant at the message body level is only available in batch messages.

## Automated message experiments

Automated message experiments take advantage of machine learning to automatically favor better performing variants over time using the multi-armed bandit strategy. This approach is somewhat different than the traditional A|B split test, but it accomplishes the same objective with more efficiency and less work for you. As with batch messages, you can create subject line and message body experiments.

- [Learn about automated message experiments here](https://support.cordial.com/hc/en-us/articles/115005533128-Experiments-in-automated-messages).

You can [view the performance of automated message experiments](https://support.cordial.com/hc/en-us/articles/360000061911-Automated-experiment-performance) in the left sidebar of the message creation page, under **Message Performance**.

The multi-armed bandit strategy doesn't allow for control variants.

## Podium Orchestration experiments

Experiments in Podium Orchestrations provide a simple yet powerful way to create and test multiple automations against one another—with the ability to select the best performing automation.

- [Learn more about Podium orchestration experiments here](https://support.cordial.com/hc/en-us/articles/360028245452).

In order to use a control variant in a Podium experiment, the experiment must be built out at the Podium level. Message body experiments in Podium use the multi-armed bandit strategy, which doesn't allow for control variants.