# Segment

> What a segment is in analytics, how rule-based segments differ from static lists, and how MIRA FIVE segments work: up to 10 rules, or a list of ids.

URL: https://mirafive.io/glossary/segment  
Updated: 2026-09-28

A segment is a named group of people, defined by rules such as where they came from or what they did, or by a list, used to filter reports.

A segment narrows a report to the people who match a description: came from a campaign, viewed pricing twice, left a cart this week. Reading the same report for different segments shows how groups differ, and that is where most useful findings come from.

There are two kinds. A static list is a fixed set of people, such as the ones who matched on the day it was made. A rule-based segment is worked out again each time you open it, so people move in and out as they act, and a changed rule applies to past data as well.

## In MIRA FIVE

Segments are saved in People, up to 50 per project, in both kinds. A rule segment has up to 10 rules, joined by “all” or “any”, and is evaluated on read, so an edit applies to history too. People can be filtered by stage, purchase, goal, action, funnel step, experiment, first or last channel, campaign, landing page, ad platform, country, device and trait, and a segment saves those rules under a name. A list segment names a group you already know, such as a beta group, by up to 10,000 of your user ids, pasted or read from a CSV file that never leaves the browser.

[Feature flags](https://mirafive.io/glossary/feature-flag) can target segments; those rules are checked on your servers.

## Example

The Acme Shop’s segment “Left a cart this week” holds 23 people. Each one has a page with the visits that led to the cart.

## Read next

### Related terms

- [Person](https://mirafive.io/glossary/person)
- [Lifecycle stage](https://mirafive.io/glossary/lifecycle-stage)
- [Action](https://mirafive.io/glossary/action)
- [Feature flag](https://mirafive.io/glossary/feature-flag)

[All terms](https://mirafive.io/glossary)

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