The presentation discusses GraphQL, an API query language and runtime for building APIs. It introduces GraphQL's key concepts, such as entry points, selection sets, and schema traversal. The presentation also covers Neo4j's integration with GraphQL, including the GraphQL database plugin and neo4j-graphql-js, which provides a JavaScript library for generating Cypher queries from GraphQL schemas. Additionally, the presentation touches on the GRANDstack, a set of tools that includes GraphQL, React, Apollo, and Neo4j, designed to build modern applications. The talk also covers how to use Apollo Client with React to query GraphQL APIs and how to generate Cypher queries using neo4j-graphql-js in other languages.