Neo4j has a powerful ETL tool called LOAD CSV [Neo4j Docs] Cypher clause that can import data from a CSV file into the database. This clause supports loading data from local filesystem or remote URI, performing multiple operations in a single statement, and can be combined with USING PERIODIC COMMIT to group operations into transactions for large amounts of data. To successfully import data, one needs to have the graph data model ready, tune cache and heap configuration, set up indexes and constraints, and use the LOAD CSV statement with common options such as accessing via column header or column index, configuring the terminator character, and using PERIODIC COMMIT to speed up the process. When loading data into GrapheneDB Neo4j instance, one needs to consider specific limitations and recommendations such as configuration restrictions on lower-end plans, lack of authentication support in neo4j-shell, and need for a publicly available URL when running from browser UI.