Gremlin, being a traversal language, allows you to navigate the nodes and edges of your graph, filter them by their properties, and perform complex aggregations and pattern-matching operations to extract valuable insights.
It has a unique design that breaks from the convention of established languages such as SQL to provide a development experience tailored to the interconnected nature of graphs.
As an open-source framework, Apache TinkerPop benefits from the support of a large community of users, vendors and contributors that build on top of the project to provide enterprise-ready graph database implementations, complete with features such as index management and storage backend configuration (e.g. JanusGraph).