At Timescale, they recommend using PostgreSQL extensions to add extra functionality to your database. They've compiled a list of their favorite PostgreSQL extensions, including TimescaleDB, PostGIS, pg_stat_statements, ZomboDB, and postgres_fdw. These extensions can help with time-series data, spatial queries, query performance, text search, and remote database access. The recommended extensions are useful for various use cases such as storing massive amounts of cloud infrastructure metrics, handling geospatial queries, tracking query performance, searching large text content, and combining data between two Postgres instances.