Hello Avi,
As I already replied via the support channel, this depends on what changes you are making in the backend. When installing new plugins or removing the unneeded plugins it’s recommended to purge the cache.
However, if you are referring to updating the posts or creating new articles then no, there is no need to purge the cache manually as it’s being handled by the Purge policy in Performance>Page Cache so the cache will be cleared automatically.
Thanks!