What is the difference between developer.apple.com and iTunes Connect?

Question

The two sites seem to be related, but I don't understand the conceptual difference between them.

Answer 1

• developer.apple.com is the developer portal with access to documentation, videos, tools etc. required to develop software for macOS, iOS, watchOS etc.
• iTunes Connect is the entry portal to the App Store used to manage content on the iTunes Store and Apple Books.