# Sessions

Measure how many sessions your experience generates.

> **Automatically tracked**
>
> The SDK automatically tracks the events that feed this widget.

This chart shows how many sessions (or visits) were exposed to your experience compared to your total traffic, so you can see if your targeted content is reaching a wide audience or only a few sessions.

> **Question: What's the difference between sessions and active users?**
>
> - **Active user**: Any visitor, human or bot, who accesses your site at least once in the selected time period. We count each unique visitor only once within that period, no matter how many returns or page views. Anonymous and identified versions of the same person are counted as different users. That is by design to track unique identities, not guessed matches.
> - **Session**: A visit to your site. It can include multiple page views and interactions. It starts when a visitor arrives and ends after 30 minutes of inactivity (by default). One active user can create multiple sessions in the same period.

## Metrics

![Sessions widget](/assets/reference/analytics/experience/sessions.png)

The chart includes:

1. **Total experience sessions**\
   How many visits were impacted by your experience.
2. **Percentage of total sessions**\
   Out of all visits to your website, how many saw your experience.
3. **Sessions over time**\
   A trend chart showing how the number of sessions evolved throughout the period.

> **Question: What does the comparison over the last period mean?**
>
> It represents the growth or decline of the metric compared to the previous period.
>
> The *last period* refers to the date filter you selected. For example, if the filter is set to the **last 7 days**, the *last period* will be the **7 days immediately before that range**.

## Interpretation

If your website had 40 sessions in total and your experience appeared in 10 of those sessions, we calculate that it impacted 25% of total sessions (10 out of 40).

We calculate this metric using the formula:

```math
Percentage \space of \space total \space sessions = \frac{total \space experience \space sessions}{total \space workspace \space sessions}
```

### What the number tells you

Here are some common insights you can get from this widget:

- A high percentage, such as 80%, indicates your experience reaches most of your audience, meaning it impacted about 8 out of 10 sessions.
- A low percentage, like 5%, suggests it impacted fewer sessions, perhaps only 1 out of 20, possibly because the experience appears only in specific scenarios or is less discoverable.

## Explore

- [Events](/reference/event/overview#event-types): Learn how to track user events for analytics and personalization.
- [Audiences](/explanation/audience): Understand how to delivery content to specific groups of users.