If you’re going to share a plot of land with other people in Crowfall, you need to understand what that sharing will entail. If you’re still unclear as to how the game’s eternal kingdoms will allow people to work together to build up, the latest official development entry spells it all out in clear language, and it’s fairly straightforward. You just need to understand how the various ranks interact and what will be expected of any given player.
Any kingdom has its monarch, its nobles, and its vassals. The monarch is the owner of the overall area, while the nobles are invited members who can place parcels of land as they wish. Vassals cannot place parcels, but can decorate on the parcels placed by nobles or the monarch. It’s a fairly complex interrelated hierarchy, so feel free to peruse the whole rundown on the official site to find out how to work with others to build a kingdom everyone can enjoy. Assuming they were invited, anyhow.