Google Tag Manager is a tag management system that lets you configure and deploy
tags on your website or mobile app, from an easy-to-use web interface. You can
use Tag Manager to optimize your tag deployment, troubleshoot configuration
errors, and modify tags that are already deployed.

Here are some reasons to use Tag Manager:

- Support for tag organization.
- Version control.
- Support for multiple tag types, including sending data directly to Google using [destination tags](https://support.google.com/tagmanager/answer/17070049).
- Community-developed tag templates.
- Enterprise collaboration.
- Security features.

[Launch
Tag Manager](https://tagmanager.google.com/)

## Deploy for web pages

Use Tag Manager to manage tags (such as measurement and marketing optimization
JavaScript tags) on your site. Without editing your site code, use Tag Manager
to add and update Google Ads, Google Analytics, Floodlight, and third-party
tags.
[Get started for web sites](https://developers.google.com/tag-platform/tag-manager)

## Deploy for mobile apps

Use Google Tag Manager to manage analytics and advertising tools in
your apps without having to rebuild and resubmit the applications'
binaries to app marketplaces.
[Get started for Android](https://developers.google.com/tag-platform/tag-manager/android/v5) [Get started for
iOS](https://developers.google.com/tag-platform/tag-manager/ios/v5)

## Server-Side Tagging

Server-Side Tagging allows you to move tag code off of your website
or app and into the Cloud. Server-Side Tagging can help you improve the
performance and security of your website or mobile app while serving all
dependent assets from your own domain.
[Get started with Server-Side
Tagging](https://developers.google.com/tag-platform/tag-manager/server-side)

## Create custom templates

Build your own tag and variable templates in Tag Manager. Submit
templates to the Community Template Gallery and make them available worldwide.
[Quick
start guide](https://developers.google.com/tag-platform/tag-manager/templates) [Submit templates to the
Community Template Gallery](https://developers.google.com/tag-platform/tag-manager/templates/gallery)

## Automate configuration with the REST API

The Google Tag Manager API provides access to Tag Manager configuration data for
an authorized user. Use the API to manage accounts, containers and container
versions, tags, rules, triggers, variables, and user permissions.
[Get
started with the REST API](https://developers.google.com/tag-platform/tag-manager/api/v2/devguide)

## Additional resources

For more information about Tag Manager features and benefits, visit the
following resources:
[Product
site](https://marketingplatform.google.com/about/tag-manager/) [Help center](https://support.google.com/tagmanager/) [Help community](https://support.google.com/tagmanager/community)