.. todo:: Compare descriptions with https://help.piwik.pro/analytics/glossary-piwik-pro-terminology/
.. glossary::
Analytics
PPAS component gathering statistics about each :term:`visitor` of the :term:`application` (previously **Piwik**).
Analytics attribute
:term:`Attribute` generated from value provided by :term:`Analytics` (e.g. browser and device data, location
data, etc.). You can read more about :term:`attribute` sources
`here <https://help.piwik.pro/audience-manager/data-sources/>`_.
.. note::
If :term:`custom attribute` uses the same name - it will be represented as a separate :term:`attribute`.
Analytics ID
ID assigned to :term:`visitor` by :term:`Analytics` for the duration of :term:`Analytics` session. It is stored in
browser cookie.
Application
Website or application tracked by PPAS.
App ID
PPAS :term:`application` identificator (previously **website ID**, **site ID** or **idSite**).
Attribute
Named value assigned to :term:`visitor` profile.
Attribute whitelist
List of :term:`visitor` :term:`attributes<attribute>` that are publicly available via Audience Manager API.
.. note::
It is still necessary to identify the :term:`visitor` with his :term:`analytics ID` to access this information.
Audience
Named set of :term:`attribute` conditions used to define a group of :term:`visitors<visitors>` matching them.
Custom attribute
:term:`Attribute` generated from value provided by source other than :term:`Analytics` (e.g.
:doc:`audience_manager/form-tracker`, :doc:`sdk/index`). You can read more about :term:`attribute` sources
`here <https://help.piwik.pro/audience-manager/data-sources/>`_.
.. warning::
:term:`Custom attribute` will store only latest value provided by any custom source.
.. note::
If :term:`analytics attribute` uses the same name - it will be represented as a separate :term:`attribute`.
Tracker (Tracker backend)
Formerly called tracker backend. A set of services that is able to receive, store and process requests from JavaScript Tracking Client. Requests processed by Tracker are passed further for Reporting services.
Device ID
Device ID (device identification) is a distinctive number associated with a smartphone or similar handheld
device. Device IDs are separate from hardware serial numbers.
Identifier
Unique identifier of a :term:`visitor` ID (e.g. :term:`analytics ID`, :term:`user ID`, :term:`device ID` or email).
JavaScript Tracking Client (JSTC)
A JavaScript object that is able to send requests to :term:`Tracker`. It is loaded and created with download of `ppms.js` file. It has an :ref:`API<data-collection-javascript-tracking-client-api>` that allows to configure what data requests should contain. You can :ref:`learn more about JSTC here<data-collection-javascript-tracking-client-installation>`
JavaScript Tracking Snippet (JSTS)
A JavaScript code, usually in form of HTML tag, that initiates JSTC and sends first tracking request. You can see an :ref:`example of JSTS here<jtc-installation-jsts-example>`.
PII
Personally Identifiable Information.
Tracking Tag
A HTML tag, that is created and configured by Tag Manager. It is loaded to the website with Tag Manager Container. Using a Tracking Tag is an alternative for implementing a JavaScript Tracking Snippet. You can `learn more about Tracking Tag here <https://help.piwik.pro/support/tag-manager/piwik-pro-tag/>`_.
User ID
Permanent ID assigned to :term:`visitor` by :term:`application` (e.g. username). You can read more about it
`here <https://help.piwik.pro/tag-manager/userid/>`_.
Visit
Period of continuous :term:`visitor` activity on :term:`application`. It ends in the following situations:
- after a period of inactivity (option set to 30 minutes by default)
- on campaign change (option enabled by default)
- when HTTP referrer points to different website (option disabled by default)
Visitor
Visitor on tracked :term:`application`.