The talk given at the FOSDEM conference in 2023 was about using the Go programming language with PostgreSQL. The speaker discussed the benefits of using Go, such as its ability to produce native binaries for multiple platforms, its simplicity, and its strong community support. They also highlighted the drivers and tools available for PostgreSQL in Go, including the PGX driver, which offers unique features like binary transfer protocol and support for all built-in PostgreSQL types. The speaker also mentioned useful extensions, testing strategies, and continuous integration and delivery methods in Go. Overall, the talk emphasized the popularity and versatility of Go for developing with PostgreSQL.