What's the pros of using uuid in neo4j

[chainrules_com]

I'm new to neo4j and I'm trying to implementing my service on GRANDstack.

I know every node have '_id' field which is auto-incremental integer index.
But with 'neo4j-graphql-js', auto-generated schema creates nodes with uuid as a default for 'id' field.

This means newly created node should have '_id', and also 'id' which is uuid.
What's good when we have these two keys?
Does having uuid boosts performance or something?

[kathryn_moore]

'_id' is an internal Neo4j value that could be reused if nodes have been deleted. The 'id' is a unique key that your application controls. Neo4j advises not relying on the '_id' value in your code.

[chainrules_com]

Ah, that makes sense. Thanks a lot!