Unlike other headless CMS, Contentful provides contents in Chunk, instead of Blob. (e.g. Wordpress)

• Start by breaking down the UI requirement
• If for same context (e.g. Translations, Carousel, Text Block, etc) — Content types can be used for across platforms / channels (i.e. both Native app and Website); free of predefined layout / context
• Styling fields should be minimized — if any required, new topics / assemblies can be considered
• Specific content type will be rendered as specific UI component in the frontend

Content type defines the structure needed for content modeling. There are two kinds of Content type; Assembly & Topic

Assembly

Examples; carousel, a set of featured events, a modular page layout, a basic page, etc.

• To put together either / both of topics & assemblies
• Sometimes reusable
• May be tied to context -> not reusable
• Bridge between business topics & frontend component

Topics

• Each topic represent specific governance / business purpose;
  • Permission
  • Internationalization plan
  • FE functional requirement
  • Other requirement*
• Reusable, smaller part of a component
• To be put inside assembly

Source: https://www.contentful.com/help/topics-and-assemblies/