GTM (google tag manager) guide
Goggle Tag Manager is a tool which allows you to manage your analytics, user tracking, campaign tracking, remarketing and other website codes in easier way. The tool was developed mostly for people who want to implement additional features (mostly analytic) to their webpages with limited IT knowledge.
In case you are already using Google Tag Manager you can use it also for smartPoint script implementation. Otherwise you can use one of the previous integration methods or install Google Tag Manager easily into your systems. Manager allows you to customize your infrastructure, build your own tools and set better integrations to fit your existing content.