These tools remove bloat. Autovacuum removes dead tuples. They are often confused, but dead tuple and bloat are different though connected concepts. A lot of a

These tools remove bloat. Autovacuum removes dead tuples. They are often confused, but dead tuple and bloat are different though connected concepts. A lot of accumulated dead tuples (row versions marked dead but still present occupying space) are converted to bloat (empty space, gaps) when VACUUM cleans them up.