# Engagement: active days

> Active days per visitor, returning share, and the identity limits of cross-day analysis.

Section: Analyze. Canonical page: https://mrkr.app/docs/analyze/engagement. Last updated: 2026-10-03.

Visitors and pageviews count arrivals. Engagement counts involvement: how often the same people come back within the range.

![The Engagement page showing a stickiness distribution of active days per visitor.](https://mrkr.app/docs/engagement.webp)

Distinct active days per visitor.

## Stickiness

For every visitor active in the range, mrkr counts the number of distinct calendar days they were active, then buckets visitors by that count. A range of 30 days can bucket someone anywhere from 1 active day up to 30.

- `Returning share`: The share of all visitors active on more than one day in the range.
- `Avg. active days`: The mean number of distinct active days per visitor.

> **Note:** This answers a different question than a retention chart. Retention asks whether someone came back at all; stickiness asks how often. A site where almost everyone shows up on exactly one day is a very different business from one where a quarter of visitors return on five separate days, even if their total visitor counts are identical.

## Where it fits

Engagement duration is measured automatically: see [Engagement time](https://mrkr.app/docs/tracking/engagement). Filters apply to stickiness the same way they apply elsewhere; see [Filters and segments](https://mrkr.app/docs/analyze/filters-and-segments). Cross-day stickiness requires cookie mode: cookieless identity rotates daily.