Quickest way to delete impotred data?

I had imported data from my current WordPress website into Ghost and now that most settings and theme is setup, I want to delete all the posts and tags and import them again. Is the best way to do this, is to simply delete all the posts and tags and then re-import everything?

Also, when should I move the domain over? Based on @Cathy_Sarisky recommendation, my plan is:

  1. Import all the posts to my Ghost Pro temp domain
  2. Remove password protection
  3. Move the Domain over

Once that is done, add Google Analytics/GSC code and other scripts. A couple of questions with domain- once the domain is live, do I need to recreate any URLs such as menu items etc. that are currently pointing to the temp domain? Also, I just want www to redirect to domain.com so what would be the right record for that (Using cloudflare)

What do you want to gain from re-importing your content? Site settings and theme don’t change anything with your content so unless you’re changing your import data, re-importing will just get you back to your current position.

The current import is about 20 days old so there are a lot of new posts. Also during import, some tags changes from, say, news to news-123cugef6734n. If I import the balance, chances are that those weird tags get recreated. So I figured best to delete all tags and posts and then reimport and then change any tags that have messed up before going live.