What is a trigger in GTM?

Related questions

1. What is the benefit of Google Tag Manager?
2. What is GTM container?
3. What is difference between document ready and window onload?
4. What is data layering?
5. How do you use Google tags?
6. Why network models are divided into layers?
7. What is data layer in GTM?
8. What is Google Tag Manager and its benefits?
9. What is layering as used in DTP?
10. What is window loaded in GTM?

Tags

1. #examine
2. #bucket
3. #content
4. #interactions
5. #event
6. #trigger
7. #custom
8. #define
9. #information
10. #pushed
11. #events
12. #would
13. #about
14. #datalayer
15. #looking
16. #match