It's Notion the block based knowledge base thingy, not the tiling manager (which got renamed from ion3 to notion I read).
> block based knowledge base
What does that even mean?
Instead of treating a document as one, every part of the document is a separate block. Every paragraph can be a block, every table is a block, every image can be a block. This makes referencing to specific information very easy, as every block can be referenced, displayed somewhere else, a.s.o.