You can create a dataset on the Datasets tab of the administrator panel. You'll need to give it a unique name in order to save it.
In this table you can also set a dataset as featured which means it will be displayed on your organization's homepage. If more than 3 datasets are set to featured, 3 will be randomly chosen when the page is loaded.
The Overview tab of this page represents what the user will see on the published page. Initially the page is unpublished, so any changes you make and save will not be visible on your homepage.
Here you can add defining characteristics to help users locate your dataset and evaluate if it is something they'd like to work with. You can learn more about assigning general characteristics here.
Populate your dataset with data so users can query it, use it in a project, and download it (if your permission system allows for it). Get started by creating a new table and uploading data to it.
The right-most box on the page has all of your navigation and access information in it. Click the Configure access button to set permissions for how users can access your dataset.
When a dataset is created, it starts unpublished and with a "next" version. You can make as many updates and edits to this page as you'd like and it won't appear on your organization's homepage.
When you're ready for your dataset to be discoverable, click the "Release and publish" button. The data will be locked but you can always go back and edit everything else about the dataset.
You can unpublish this dataset at any time. If any users have it in their projects, its data and any derivative tables containing its data will be hidden from view and use.