What are GraphQL subscriptions used for?

Related questions

1. What is schema GraphQL?
2. What is scalar type?
3. Is GraphQL relational?
4. What is a GraphQL fragment?
5. What is a GraphQL query?
6. What is a benefit of the GraphQL schema and strong type system?
7. When did GraphQL come out?
8. Why is it called GraphQL?
9. What's a major benefit of using a GraphQL client library?
10. What is GraphQL and how do you use it?

Tags

1. #client
2. #maintains
3. #usually
4. #happens
5. #implemented
6. #graphql
7. #steady
8. #clients
9. #subscribed
10. #subscriptions
11. #feature
12. #websockets
13. #specific
14. #connection
15. #allows
16. #server
17. #setup
18. #event