Google Tag Manager-Pros and Cons

General features
Google Tag Manager offers simple, reliable, easily integrated tag management solutions for free. It loads tags asynchronously that is independently from one another and don’t slow down your pages. With tag sequencing you can specify tags to load immediately before or after a specified tag to make sure that things happen just the way you expect. Instant search and autocomplete features let you easily and rapidly find anything in your containers.
Google Tag Manager let you add new tags or modify existing ones and publish these updates to your users with just a few clicks. You can preview all tags within your container and any associated triggers in one shot. You can also easily add, change or remove tags. Google Tag Manager allow you to set tags that fire with certain on-site events without any extra code. You can also set a tag to fire based on a custom event. For example, a custom video player on your site. Tag Manager integrates with other Google solutions to help you more efficiently and effectively launch and manage your campaigns.
Other Features
Google Tag Manager let you collect the most important data elements on your pages and define reusable variables for future use. You can temporarily disable any tag from executing without having to delete the tag or adjust its triggers. This helps troubleshooting or working on a timed campaign. You can also organize tags, triggers, and variables into logical groupings, making them easier for you to work with.
Google Tag Manager let you see how the changes you’ve made actually work before deploying live to your site. You can keep record of what’s been published on your site. This helps you to easily return to a prior version at any time. Google Tag Manager let set a tag to fire when a particular form is submitted. This do not require any additional code.
Why use it?
Google Tag Manager provides you the facility to add and update your own tags for conversion tracking, site analytics, remarketing, and more thus improve your agility. Easy-to-use error checking and speedy tag loading confirm your mission-critical data is gathered reliably and accurately. Workspaces and granular access controls let your team to work together efficiently, whereas multi-environment testing allows you publish to different environments to ensure things are working as expected. Google Tag Manager let you add or change your tags as needed. It offers easy-to-use templates for a wide range of Google and third-party tags for web and mobile apps.
Industry’s Positive Comments
Customers likes that Google Tag Manager provides total freedom to release or pause marketing campaigns according to their calendar and objectives. It allows us to add scripts without errors. It is a great tool for adding all required website tags & codes in one place, making it easy to keep track of what is already installed on websites.
Customers says that the data layer of Google Tag Manager helps developers avoid having to hard-code tags like Facebook events in a site’s JavaScript files. They like that the platform is very visual and they can see things divided and outlined clearly.
Needs Improvement
Customers says that there is no chat support available for quick resolution. Further, you should have a basic JavaScript understanding to use this tool to it’s full potential or else there will be many roadblocks headed your way. It has a steep learning curve to figure out how everything works.
Similar Products in Industry
Other tag management solutions available in market are Heap, Amplitude Analytics, Mixpanel, Adobe Analytics, Tealium iQ Tag Management, Smartlook, Pendo, Siteimprove, Impact, Woopra etc