PostgreSQL vacuuming is essential for maintaining the health and efficiency of your database. Vacuuming helps optimize performance and resource usage by marking dead rows as available to store new data, updating a visibility map, preventing transaction ID wraparound failure, and more. Monitoring key metrics and events, such as `pg_stat_user_tables`, can help ensure that vacuum processes are running smoothly across your databases. Investigating common issues, including autovacuuming problems, lock conflicts, and long-running open transactions, is crucial to resolving vacuuming-related issues. Correlating vacuuming activity with performance indicators and infrastructure metrics using tools like Datadog can provide deep visibility into database health and overall application performance.