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This document describes the default Frosmo Platform configuration and data tracking for a website visitor who enters a site as a new visitor.

Table of Contents


The Frosmo JavaScript library, which runs on top of a website in the visitor’s browser, consists of the following components:

  • The Frosmo Core library implements the core functionality and services of the Frosmo JavaScript solution. The library manages modifications and segmentation, collects usage data, and fetches modification content from the back end. The library is the same for all customers and sites.
  • The Frosmo custom script contains the configurations and custom code specific to a single site. These are used to modify the content and functionality of the site. The custom script is unique to each site (or group of sites managed as a single site).

For more information about the Frosmo JavaScript library, see Technical overview.

When a visitor enters a site running the Frosmo Platform, Frosmo Core loads and starts automatically When a visitor enters a site running the Frosmo Platform, the Frosmo JavaScript library loads in the visitor's browser and starts tracking the visitor's activities on the site. This happens even when the site has no site-specific configurations, such as modifications or segments, or custom code defined for it.

In addition, the Frosmo Platform assigns the visitor an identifier (local Frosmo ID), decile, and possible other indicators.

For more information, see:

Default configuration

The Frosmo Platform For tracking purposes, the platform automatically sets the following indicators for a to each visitor:

Table of Contents

Local Frosmo ID


Global Frosmo ID (if target groups are enabled for the company)




Comparison group (if used on the site)

Local Frosmo ID

The local Frosmo ID is an identifier that is used to identify the visitor (browser) on the Frosmo Platform in order to retrieve visitor-related data This ID uniquely identifies the visitor inside a single site. The ID allows the platform to track the visitor's interactions on the site and retrieve data specific to them from the Frosmo back end.

The ID is stored in the browser’s local storage (or, if cached modifications are enabled for the site and on Apple devices, in a cookie) and it is unique within a site. The local Frosmo ID persists until the visitor clears their browser cache or the ID is otherwise manually removedplatform generates the ID from the user agent (UA) string of the visitor's browser and the timestamp of their entry to the site. The ID does not contain any personal data that can be used to identify the visitor's person.

The platform stores the ID in the visitor's browser, either in local storage or in a first-party cookie. If the browser cache for the site is cleared, either manually by the visitor or automatically by the browser, the ID is deleted from the browser. The visitor's next interaction on the site with the same browser registers them as a new visitor with a new ID.

Global Frosmo ID

The global Frosmo ID is a third-party cookie This ID uniquely identifies the visitor across all sites of a company. The ID does not contain any personal data that can be used to identify the visitor (browser) across different domains and websites. The cookie is set only if target groups are enabled for the company's person. The platform stores the ID in the visitor's browser in a third-party cookie.


Every visitor entering a website running the Frosmo Platform is randomly placed The platform randomly places every new visitor in one of ten deciles. The visitor stays in the same decile until the they clear their browser cache and cookies are cleared.

You can use deciles in A/B testing: for example, you can determine that 50% (five of the ten deciles) of your target audience sees modification A, while 50% (the remaining five deciles) sees modification B, or no modification at all. This assigns a specific group of visitors to modification A and prevents group A from affecting the statistics of group B.

Deciles enable you to test your content with just a part of a segment instead of entire segments.

In the Frosmo Control Panel, you can define the target deciles for each modification.

Comparison group

In the Frosmo context, a comparison group refers to . The deciles are built-in visitor segments to which you can target modifications. By default, modifications display to all ten deciles, but you can set individual modifications to target only selected deciles. The visitor's decile placement applies across all modifications on a site.

You can use deciles on their own or in combination with segments and affinity groups to refine the target audiences of your modifications. For example: You can target just part of a segment by assigning a modification to the segment and setting the modification to target only selected deciles. A visitor will see the modification only if they are in the segment and in one of the selected deciles.

Comparison group

The comparison group consists of visitors who see the original content of a web page instead of modifications. The comparison group allows you to monitor modification performance as compared to your original content.The Frosmo Platform automatically divides all visitors entering a site into two groups (a and b)platform automatically places 10% of all visitors in the comparison group. An individual visitor always either belongs or does not belong to the comparison group.

For visitors in the comparison group to see the original content instead of a modification, the modification must have its comparison group variation enabled. If enabled, visitors in the comparison group do not see the modification, while visitors not in the comparison group see the modification normally. If the comparison group feature is enabled for a modification, 10% of the visitors (group b) will not variation is disabled, all visitors see the modification, including those in the comparison group. Once a visitor is included in enters the comparison group, that visitor will not see any modifications on the site that have the feature comparison group variation enabled.You enable the

The comparison group for a modification when creating the modification. If the comparison group is enabled, a tracking variation is automatically created for the modification. If the modification has been active (and therefore, statistics have already been created for the modification), you cannot remove the tracking variation.


allows you to monitor modification performance as compared to your original content.


If you want to use the comparison group on your site, enable it for all modifications. This ensures that the modification statistics for your site remain internally consistent and valid.

Default data tracking

The Frosmo Platform automatically collects the following data for a visitor:

In addition, visit data, such as visit dates and times, IP addresses, and page referrer information, is stored in server logs. For more information, see Data collection and storage.


By default, the visit data is not combined with the visitor’s local or global Frosmo ID. This means that you cannot identify a specific visitor based on the visit data.

Site traffic

To monitor the trends in site traffic, the Frosmo Platform tracks the number of daily visitors and sessions.

To view the site traffic statistics, in the Frosmo Control Panel, select Statistics > Traffic. You can view the following statistics as integers:

  • Daily unique visitors
  • Monthly unique visitors
  • Daily sessions
  • Monthly sessions

Daily and monthly unique visitorsImage Removed

Figure: Daily and monthly unique visitors

Daily and monthly sessionsImage Removed

Figure: Daily and monthly sessions

Visitor retention

Retention means the number or proportion of visitors who have visited your site more than once.

To view the site retention statistics, in the Control Panel, select Statistics > Retention. You can view the following retention statistics:

  • Returning visitors per day as a percentage of all visitors (after 1, 3, 7, and 30 days)
  • Returning visitors per day as integers (after 1, 3, 7, and 30 days)
  • New visitors as integers

Returning visitors per dayImage Removed

Figure: Returning visitors per day

New visitors per dayImage Removed

Figure: New visitors per day

Visit sources

Visit sources refer to the domains in which a visitor clicks a link to end up on your site. They can also enter your site by typing its URL directly in the browser’s address bar.

To view the visit source statistics, in the Control Panel, select Statistics > Sources. You can view the following visit source statistics:

  • All daily visitors by referring domain
  • New visitors by referring domain

Visitors by referring domainImage Removed


mutually comparable.