# Understanding how Gremlin queries work in Neptune
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To take full advantage of the Gremlin `explain` and `profile` reports in Amazon Neptune, it is helpful to understand some background information about Gremlin queries.

**Topics**
+ [Gremlin statements in Neptune](gremlin-explain-background-statements.md)
+ [How Neptune processes Gremlin queries using statement indexes](gremlin-explain-background-indexing-examples.md)
+ [How Gremlin queries are processed in Neptune](gremlin-explain-background-querying.md)