DC Comics is known for its deep exploration of science fiction concepts surrounding time and space, the best-known of which is the multiverse. First created in the Silver Age of comics, this idea gave companies the freedom to explore new takes on their biggest and best characters without impacting continuity. However, years later, DC created Hypertime in an effort to clear up continuity issues but also left readers wondering what the difference between the two ideas is.
Source:https://www.cbr.com/difference-between-hypertime-multiverse-dc-comics/