Hello!
Sure. GraphQL replaces the need of multiple endpoints - you no longer need to code in each request. From this, for each data type (both client side and server endpoint wise):
fetch('localhost/posts/1&)
fetch('localhost/users/2&)
=>
You simply connect to Apollo Server, describe query with gql and fetching is automatic.
In most cases data is updated automatically given it changes in the storing location. Also, there is data caching to make it faster.
Nevertheless, I think, the biggest advantage is the ease of development once you get used to. You can also follow the graph schema of your data in it's UI.
Best regards,
Monika