## Overview

Each sequence in Apollo has its own set of statistics.

This data is divided into two categories:

- Contact Stage statistics
- Email Tracking statistics

Refer to the sections below for additional details about each type.

## Contact Stage Statistics

"Contact Stage" statistics are available on the lefthand side of the sequence screen.

Please note, clicking on an individual statistic will bring you to the relevant stage in your sequence's **Contacts** tab.

"Contact Stage" statistics provide the following data points:

**Active**: The total number of contacts who are currently in the sequence**Paused**: The total number of contacts who are currently in the sequence, but are paused on a certain step**Finished**: The total number of contacts who have either completed the sequence or met a**Mark sequence as finished**trigger in the sequence's**Settings**tab**Bounced**: The total number of contacts who had their email bounce after receiving a message in the sequence**Not sent**: The total number of contacts who have met a**Mark as failed when**trigger in the sequence's**Settings**tab

## Email Tracking Statistics

Please note, the totals in the **Delivered** and **Open** categories will rarely line up with the **Overview** tab and the **Emails** tab. This is because the **Emails** tab shows stats relative to the emails themselves, rather than the contacts who were emailed. The **Overview** tab shows stats relative to those contacts. It's possible to deliver more than one message to a contact in a sequence and this explains the discrepancy.

"Email Tracking" statistics are available on the righthand side of the sequence screen.

Please note, clicking on an individual statistic will bring you to the relevant stage in your sequence's **Emails** tab.

"Email Tracking" statistics provide the following data points:

**Scheduled**: The total number of contacts currently scheduled to receive a message in the sequence**Delivered**: The total number of contacts who have been delivered at least one message in the sequence**Open**: The total number of contacts who have opened at least one message in the sequence**Click**: The total number of contacts who have clicked at least one link in the sequence's messages**Reply**: The total number of contacts who have replied to at least one of the sequence's messages**Interested**: The total number of contacts who were marked as interested after receiving one of the sequence's messages, or accepting a calendar invite**Opt out**: The total number of contacts who have clicked an opt-out (unsubscribe) link in one of the sequence's messages

Aggregate statistics are determined by the total number of emails delivered in the sequence. The overall sequence percentages are calculated by dividing by the total number of emails delivered. When you hover your mouse over the percentages, you will then see the numerical count for that stat.

In the example above, the 82.2% open rate for the sequence is determined by the total number of open emails (106) divided by the total number of delivered emails (129). Email stats in individual sequence steps are calculated the same way as the aggregate—dividing by the total number of emails delivered for that one message.

Please note, if you delete contacts from your account, Apollo reflects this change in the statistics header under the "Emails" tab.

Apollo deletes the records of any emails that you sent to the deleted contacts; however, the “Overview” tab still displays statistics for every email that you have sent since you activated the sequence.