Tag management is an essential component of any tracking deployment. The most common reasons it’s used include:
- Agility & Control
- Remarketing
- Deployment Cost
- Site Speed
- Privacy
Source: econsultancy.com/reports/tag-management-buyers-guide
Additionally, it standardises data capture, by using a common set of object names across multiple websites. This significantly simplifies installations as generic configuration files can be used (click below to see my 3 cheat sheets).
#digitalData JSON object names cheat sheet
GTM DataLayer cheat sheet (Enhanced Ecommerce version)
GTM DataLayer cheat sheet (App version)